Friday, 24 August 2007
Photographic success
Posted by
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03:24
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Labels: Thoughts on art, Travel
Wednesday, 22 August 2007
and service resumes
After a pretty successful trip, I'm back. I've not looked at a single one of the 600 or so shots I made while I was away so that's yet more work for me. Right now, jet lag is getting in the way. My body wants to sleep at all the wrong times (like the photo filled free-time) and fully alert when it's less convenient (such as my regular office hours).
On the photo front I can comment that I had a lot of fun picture-making time while I was away and I'll be blogging on such subjects shortly.
Of course the big news on my return were the announcements from Canon on their new gear - do I have thoughts on that? Not sure yet but some of the new stuff looks interesting for sure.
Posted by
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03:53
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Labels: Random
Friday, 10 August 2007
Away on my travels
I'm now off for 10 days on a business trip (with a bit of photo time thrown in) to Calgary, so posting may not be possible for the next week or so.
Hopefully I'll come back with another bunch of great pictures to develop & share, not that I've finished the work from the last 2 trips.
Posted by
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05:10
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Labels: Random
Updated portfolio
I've now got a load more photos to add to the portfolio and at the same time decided to make a few changes and implement an internal policy. From now, I'll restrict each of the 3 main portfolio categories to 24 shots (1 page of thumbnails). This will force me to cull all but the very best photos and keeps it quite fresh.
The 36 bicycles set will remain, and if I implement other projects they will get their own sections - this gives me the freedom to bring coherent sets of images together.
Check out the updates here.
Posted by
doonster
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05:08
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Labels: Workflow
Connection
In response to a question I posed, Mark Hobson (The Landscapist) has posted a response, discussing the issue of the photographer connecting with subject and viewer. On reflection, I think I agree with him.
I take away 2 things from his response.
First, as a photographer, I cannot assume a viewer connects with my subject just because I do. Some might connect, of course, and that would give the image meaning for them but it is not an automatic process. I have to reach out in some way if I want others to draw meaning or have some kind of connection with the work.
Second, as a viewer, if I connect with an image I cannot assume others are. What for me has deep insight may be little more than a asnapshot to others. The reverse holds true as well - just because I may not connect doesn't mean others won't. We all draw differnt things from art, unless the artist delibrately sets the context for us.
As an illustration, I deliberately chose the photo to go with this post. On first glance it may look like nothing more than a snapshot of a random wheat field. I've titled it, that may give more context but I can't expect anyone to have thesame connection that I have with the scene.
In fact, it holds quite a lot of meaning for me. It is inspired by Van Gogh's "Wheatfields under Thunderclouds", a painting I was very much drawn to when I first saw it in the Van Gogh Museum in Amsterdam. the connection for me, however is in the fact that it is one of two pictures I own (merely posters) that, once hung on the wall, make a house a home. For someone who moves a lot (6 times in 10 years), that becomes important. The other picture is Picasso's "Femme assise au capuchon".
Posted by
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03:50
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Labels: Thoughts on art
Added depth in monochrome
As I commented, I've been using these techniques for colour work with some success but never thought to apply them to monochrome work. Having had a few difficult cases recently, I went back to take another look. Here are the results. In all cases - Capture one for the conversion (does the smoothest dark tone conversion, IMO), Photomatix Pro for HDR combination, Lightzone for final adjustments.
In this case, I did the HDR work in color then performed a conversion to B&W. There is clearly more detail in the far wall, and the water level in the opposite lock can be seen. Slight noise reduction necessary there to stop it looking too grainy compared to the rest of the image. Final print optimization not yet done.
Here, I worked the conversion in B&W from the start, to see how that affected workflow. No real problem as far as I was concerned. The image has 2 lots of colouration applied which is why it appear to be a colour image. I much happier with the fine detail in the smooth water over the weir and the less aggressive specular highlights in the foam.
Overall, a success: not for universal use but good for tricky shots and more abstract work. Just as I apply it for colour work.
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03:47
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Wednesday, 8 August 2007
Dissatisfaction
Looking again at the photo attending the yesterday's post, I realise what a hash I made of the conversion: posterization, too much noise reduction. Uck!
Posted by
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02:17
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Labels: Workflow
Masters of Photography
Reading the stuff on 20th Century photography following the post & links at T.O.P. I realised that my photo art knowledge was sadly lacking.
Doing a search (actually for Winogrand) I turned up this handy resource for photographers - a whole buch of names, their photos and links to other resources. Handy for those looking for further information.
Posted by
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01:47
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Labels: Photographers
Monday, 6 August 2007
Metering and highlights in the digital world
Posted by
doonster
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23:07
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Thursday, 2 August 2007
Art for scientists?
While thinking about the contrast between my job and my photo life as displayed via the blog I wondered - is photography art for scientists?
I know many with a science/engineering background who are keen to serious photographers (not just holiday snappers) but very few who take up other art forms (save maybe the odd musician). I think it has something to do with the bit that comes between vision and execution: namely technique.
I don't believe vision defines artists, but the execution of that vision. Art is not in the concept but the doing and making.
Whether you ae an "art as verb" type or "art as noun" type, there is a clear part of the art process that is the "doing" requiring some sort of technique to be applied. It might be paint, pencil, sculpture or indeed photography. I believe that the technique one chooses is largely based on talent, some sort of aptitude or affinity for the medium. Hence the scientist drawn towards photography: it is a very technology, mechanial kind of art form. The camera is very much a mechanical (or these electronic) device that I think sits well with the scientific mind.
I know for me, personally, there is "art as concept" going on in the brain. I can see the world as a seres of pictures, moments, whatever. I also know that I have not the aptitude to capture what I see with brush or pen but have a natural feel for the use of a camera. I like the mechanical aspect in bringing my vision to fruition, working the camera seems to come quite natural.
With the advent of digital editting it also fits in well with my bits & pieces approach to working. In the darkroom one has to have the patience and appliction to seethe job through. with the comptuer I can come and go to the work, tweaking and refining, erasing mistakes and so on.
Posted by
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01:28
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Labels: Thoughts on art
Tuesday, 31 July 2007
Fleet Street in pictures
Posted by
doonster
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19:14
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Labels: Photographers
Breaking news: AP at war
It's an interesting slide show & series of interviews - well worth a look.
Posted by
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19:12
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Labels: Photographers
Thinking, seeing, in aspect ratios
Just looking at the pictures for the last two posts, I started thinking about how I visualise aspect ratio [AR] (if indeed I do). The "Cycle tunnel" shot is from the SLR, aspect ratio 6:4 (3:2), "Atop Alpe d'Huez" is from the digicam, AR 5.33:4 (4:3). Neither ratio is quite perfect - 6:4 looks a bit long (landscape too wide) - a bit less rock on the right would be better; 5:4 a bit short (landscape too tall) - light cropping from the bottom, maybe a sliver off the right.
So what is "ideal", how do I view AR and what about square images and wide panoramas?
One thing I have learnt about my own way of seeing is that I almost always think in terms of width of framing, even for portrait subjects. I then aim to capture everything I want in height through position or focal length. Taken to extremes, when I visualise a square image, I hold the camera in portrait orientation so the camera naturally frames the width I want. For panoramics, I always look for the extreme parts I want to capture to left and right, then selecting focal length to capture the height I want - number of shots falls out naturally from there.
What about "normal" shots - single frame, no cropping. In the past I thought I liked a slightly wide landscape AR (say 16:9) and for portrait a slightly short AR (say 5:4). Now I'm not so sure. The wide landscape AR comes from my view of the "grand scenic" - mountains and the like - which I often view in a panoramic kind of way. Not really indicative of the majority of landscape orientation shots. I often find myself cropping the long side of shots from the SLR - not quiet from 6:4 to 5:4.
SO that leads to the final point, and the first question: what's ideal? For me, I think something between 5:4 and 6:4. I might experiment, but 2 obvious candidates are 5.5:4 (round the difference) and 5.66:4 (1.41:1, format of A-size paper, and about the average). This won't be a universal truth of course, but might inform my general framing & cropping. What about Golden Ratio (6.472:4, 1.618:1) - seems so wide it's never considered in general photography.
Posted by
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17:05
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Labels: Thoughts on art, Workflow
Beginning of something useful?
Posted by
doonster
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06:29
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Monday, 30 July 2007
Labelling the blog
I finally decided to apply labels to my posts, largely because I was having trouble tracking older posts.
So now you can check out your favourite(!) topics and posts by type. Of course, my idea of a grouping is entirely personal.
Posted by
doonster
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00:29
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Labels: Random
Sunday, 29 July 2007
Things which cannot be photographed
Something I noticed this evening reminded me of an even more impressive sight I saw during he week. Tonight, the wind was blowing through the trees in such a way that the leaves shimmered as they turned into and out of the evening sun. red leaves in particular glittered.
On Wednesday evening I was out having a few beers outside a local bar. The wall of the building next door was covered in ivy, all 4 stories of it. the wind was blowing down the street in such a way to make the ivy ripple like waves. It made the wall seem alive, as if the whole brick surface was rippling.
Both these events made me realise that there are some things that cannot be photographed. The photo image is just a point in time and sometimes things are more than points in time. Both the wind effects I describe could never be captured in a still image satisfactorily (I know, I've tried). Whilst movement (or the sense thereof, as above) can be portrayed in a still image, there will always be events that are best viewed as movement.
Hopefully those of us with cameras spend enough time away from the viewfinder to notice the dynamic events all around us, as well as trying to capture the moment.
Posted by
doonster
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03:27
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Labels: Thoughts on art
Saturday, 28 July 2007
A couple more Perouges


I can never quite decide with images like this whether I prefer colour or black & white. There are merits to both, of course. Then sometimes I try something a bit more unusual:
It may seem I've posted quite a lot from a single morning's photography but with good reason. It was the one time on the trip I had time to just concentrate on making pictures: much of the rest of the week's efforts amounts to holiday snaps. Fun if you were there.
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05:07
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More from Perouges
Skyline, Perouges, France, July 2007Perouges, just north of Lyon in France, is an interesting location both to stay and to photograph. It is a small mediaevel citadel preserved in near-historic condition. It is clearly a tourist spot and has been the location for many films set in mediaevel France. It is a maze of cobbled streets and interesting architectural corners.
Overnight we ate in the restaurant of the one hotel in town, a very pleasant (if somewhat expensive) evening - something of a modern meets ancient dining experience.
In the morning, while the rest of the team ate a late breakfast I spent some time wandering around photographing the life out of the place. There is so much of possible interest that i didn't want to pass up the opportunity. With limited time and fast-brightening skies, bracketing everything was the order: many bright highlights and dark shadows. With no tripod, developing the pictures is a challenge.
Here are a couple more results from the morning's efforts.
Gallery, Perouges, France, July 2007
Angles, Perouges, France, July 2007
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04:25
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A travelling dilemma
Posted by
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03:03
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Labels: Travel
Friday, 27 July 2007
A roll of film: 36 bicycles
I've posted the entire collection in a folder on my portfolio site. Overall, there are about 3 that don't work technically, a few that didn't quite show what I thought I saw but on the whole I'm quite encouraged by the results. Hope you like some of the results, too.
Posted by
doonster
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02:40
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Labels: Workflow
Friday, 20 July 2007
Another weekend away...
...this time to Heidelberg in Germany. Another opportunity to flood myself with photos to stack onto the other incomplete work. Looks like a busy few evenings in the next couple of weeks.
One reason I know I'll have quite a bit to do is that I enjoy photographing historic towns. I like the way grand buildings sit alongside alleyways of odd-shaped houses, the hap-hazard nature of the street layouts and the way in which centuries of development and progress is laid out for all to see. This means I egt all kinds of interesting shots & interpretations to look at, often in difficult lighting. If it is sunny then there is always great contrast in every scene: bright skies, sunlit stonework, dark shadows. A real chalenge for handheld photography.
This will also be the first time I'll get to use my new 17-55IS lens in earnest for the purpose I bought it - available light photography of building interiors. I'll report back on my impressions of the lens for that purpose on my return.
Posted by
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16:12
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Labels: Travel
Tuesday, 17 July 2007
An interesting exercise
Blogs have been intermittent recently as I've got my parents visiting, which inevitably means I can't spend as much time with the photo work as normal. One spin-off, however, has been the small assignment they've asked me to do.
Next month my parents celebrate their 40th wedding anniversary (we should all last so long) and wanted some of their wedding photos on display for the big day. As a result, I've been scanning some of their wedding album, retouching and reprinting. Everything is in black and white, which makes it a little easier - there were only a few colour shots taken that day 40 years ago: "colour was only just coming in" was my Mum's observation.
Several things have been interesting about it. Firstly are the high resolution reflective scans. The V750 does a nice job - easily able to out-resolve the prints -, the dust & scratch tool works as advertised and the overall quality is very high. I settled on 1200dpi scans as offering the limit of detail and grain suppression. The textured matt surfaces throw up quite a lot of grain/luminance noise in scanning.
This leads to the second observation - how much film & print have moved on in 40 years. These are good quality prints. Having been stored in an archival album, in the loft, in a box, there is no fading, curling etc. However, every bit of grain in the film is apparent and the level of resolution returned is nothing compared to modern materials. In a couple it is hard to tell whether it is a lack of critical focus or lack of film capability that is limiting.
Final observation is that even with all these limitations, the photos touch up very nice in digital. Scan, dust removal (PS dust & scratch tool), contrast, levels are all that's needed to bring the scans up. I'm only making 12" prints which means de-ressing the scans followed by final sharpening. I only ran 1 print last night but the result was a finer print than the original; of course no more detail but a generally more pleasing result (I think).
One of the prints I'm working on is one of the original proofs, which is made on much lower quality materials. It's curled, yellowed and has PROOF stamped across it. Despite that, I'm able to produce a good result and even remove the stamp mark with some careful
I wonder how photographers of the future will look back on our efforts today? Will things move on such that they will make similar observations to me?
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15:02
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Labels: Workflow
Friday, 13 July 2007
Stitching and cropping
The accompanying shot is an example: made from 6 images, handheld, the full size picture is 4200x7800 pixels.
In a side note, George Barr has posted a reply to a comment I made about knowing when to keep working on a picture. A very good post that helps consolidate my thinking.
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01:54
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Thursday, 12 July 2007
That wasn't so good
On looking at the pictures I added to the last post, I realised that the web just isn't very good for pushing that kind of idea. The top image has a lot of detail in the final incarnation that just doesn't show here. Here is a crop to illustrate:
The rivets on the door are clearly visible (I hope) and there is more detail in the far landscape than the little picture can show. Oddly, though, the shot straight out of the camera is just as bad in reality as shown in the small view.
The web really is a frustrating place for photography - maybe that is why everyone is pushing for the wow-factor shots, anything remotely subtle just doesn't show up clearly enough.
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02:03
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Labels: Workflow
Wednesday, 11 July 2007
What is a camera for?

For me, the digital camera is nothing more than a means to capture data: both the spatial data (framing the image) and the colour data (in the RGB storage). the aim is to capture as much as possible without losing anything. My ideal is a low-contrast capture fully exposed to the right: all the data contained in the high value bits. That gives me the greatest opportunity to develop the image as I saw it. The shots illustrating the post demonstrate an example: at the top the edited version; below, straight from the camera.
Posted by
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02:06
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Labels: Thoughts on art
Tuesday, 10 July 2007
The day Le Tour came to town
Limited posts over the past few days are due to the fact that I was in London for the weekend: the Tour de France was in town for the Grand Depart. Saturday was the prologue - a short time trial around the famous sites, followed by the first stage on Sunday.
What a great event London stages. There were people standing 6 or 7 deep at every point around the 8km of the prologue route. People everywhere and from all over - in front of me were 2 Norwegian couples over especially for the day. Far more people than when I watched the Prologue in Liege, Belgium a couple of years ago, and they're cycling mad over there.
It's also a sports photographers dream: each rider comes past at 1 minute intervals, good views, full day out. For once Buckingham Palace (above) wasn't the main attraction.
Now I've hundreds of shots to go through, on top of the other 2 shoots uncompleted.
Posted by
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05:23
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Labels: Travel
Friday, 6 July 2007
The problems of being a part-timer
As you may have guessed, I'm very much the amateur (for the love) photographer - it is an addition to the rest of my life, albeit a very pleasantly enjoyable one.
this leads to a problem, which I am currently facing: there are too many new pictures to work on, too many images in waiting, too many projects to keep up with. Having got back from France on Sunday evening, I've just been 2 days away on business and busy in between times. I've only just finished cataloguing the France photos, still have half my project from the week before and this weekend I'm off again for the start of the Tour de France.
Too much to do, too little time. I don't have the patience to leave things for a long period - I want to get it done, clear out each job in order and make space for the next. Not that I rush the work, but I don't like it stacking up. Must persevere, though, or nothing will get done.
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02:02
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Labels: Thoughts on art
Tuesday, 3 July 2007
Finally, a use for cameraphones
During the trip, Dave was posting "bloggable events" direct to his blog portableeye. It was a fun way to get pictures of the goings-on to the web quickly from remote locations and the link quickly became a hit with friends around the world. Turns into a sort of daily photoblog of the trip in a kind of Holga-view way. Good fun while we were at it.
If you want to check it out, anything from 22/6 to 2/7 is our jaunt across France.
I'll be doing the more serious photo end of the trip but this was kind of fun. Almost makes me want to get a device that can do something similar. For once, 2MP isn't really a limitation.
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04:54
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Ken Russell once was a photographer
Reading through some news stuff on the web, came across this interview with Ken Russell (well known film director) about the photography work he did some while back. The interview ties in with an exhibition of the work relating to that period of his life. Interesting stuff, in my opinion, and certainly the sort of instinctive feel for "street photography" that I think we all wish we had.
Now I'm back from vacation, there's a pile of photos to go through. More on that later.
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01:30
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Labels: Photographers
Friday, 22 June 2007
Away on vacation
I'm off on a week's vacation in a couple of hours. 7 days cycling across France with a group of friends heading for Alpe d'Huez. Another cycling challenge and hopefully some interesting photographic opportunities as we cross the Burgundy and Cote d'Or regions. Might even be a couple of glasses of wine along the way.
As a result, no blogs for nearly 10 days.
Posted by
doonster
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15:36
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Labels: Travel
Blencathra part 5: final image and monochrome

Sky is converted with an orange filter, foreground with a magenta and the rest with a yellow filter. Each picked for its positive effect on contrast and brightness.
Here's the result:

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08:15
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Blencathra part 4: the rest of the image
As ever for this picture, increasing the contrast to bring out the subtle shading is a prime goal, then some light sharpening and a slight reduction in saturation.

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08:12
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Good art, bad art, fine art
I've been reading quite a lot recently about views on art, critics, reviews, the nature of fine art photography etc. this got me thinking about the way I view these various ideas about art & photography (not mutually exclusive as that statement might imply). Here, then, my thoughts:
Good art: art has some sort of purpose to it, a reaction invoked in the viewer. The reaction invoked may, or may not, be what the artist intended but it is there. Good art, for me, is that which invokes the desired reaction in a positive manner - the "I get that, I know what the artist was about" sort of reaction. that doesn't mean that your reaction has to be positive ("I feel all warm and fuzzy"). Succeeding in invoking feelings of anger or disgust may be just as much good in this context. "I like it art" is only a sub-set of Good Art.
Bad art: by it's very nature, not good art. If the artist fails in intentions or the viewer is switched off on viewing, then the work, for that viewer, is bad. I highlight the viewer aspect because art really is in the eye of the beholder. George Barr gets to the nub of this issue talking about not liking art forms. I'll get back to this idea later.
Fine art: sometimes, good or bad, art is well executed and there is inherent quality merely in the presentation and execution of the work. this is Fine Art as I see it. Generally for photography we are talking about great prints with depth of tone, fine detail, broad contrast range. It's the mater of details, the individual brush strokes, seeing the chisel marks, whatever. Such works can be appreciated purely for the craftsmanship, independent of the Goodness demonstrated.
Critical appreciation is all about defining Good Art in ones own mind. I had initially thought that Good Art can stand by itself as an independent work but there is no such thing. all of our views on art are coloured by our experiences, culture, previous exposure to art. the same is true of reviewers: their judgements flow from the works that went before, internal comparisons with their own frame of reference. No one can truly say they are judging a work on its own merits. this is why Good Art and Bad Art must be personal judgements - while the success of a show or gallery may be dependent on the opinion of reviewers, they do not have exclusive insight into the nature of Good and Bad. One must decide for oneself.
Posted by
doonster
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02:04
1 comments
Labels: Thoughts on art
Wednesday, 20 June 2007
Blencathra part 3: focal points
In this case, I've focussed on contrast enhancement, some added brightness and then sharpening. Minimum colour adjustment: I like the way the colours are coming off the film. One thing that I do, though, is to increase the saturation slightly for the main focal point, here the Fell in the distance. I shall probably also reduce the saturation of the secondary areas. Our eyes are much more sensitive to colour in the centre of our vision, and so this fools the brain, drawing the eye where I want it to go. I think it is more effective and less obtrusive than substantial differences in sharpness that is often used for the same effect. Not that I don't use the latter trick, of course.



Last word here: there are 2 more installments to come - the secondary parts of the image and the final result (together with black and white conversion).
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06:42
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Naming the image
Doug Stockdale has recently been posting (here and here) about various ways of naming some of his images in the ongoing Bad Trip - Sad Trip project.
It occurred to me that his very carefully studied manner of determining a suitable final title is very much in opposition to mine. I tend to work instinctively for titles. Unless it is a straight proper noun, the name I apply is usually a direct reflection of the initial attraction for me to take the picture in the first place.
Maybe this stems from my general aversion to project based photography. The titles then flow from the instinct that draws me to raise the camera to my eye in the first place. From a personal point of view, I feel that then gives me a closer connection to my photographs because they reflect the mood I was in at the time.
Then again, I might just be good at coming up with names.
Posted by
doonster
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05:06
1 comments
Labels: Thoughts on art
Tuesday, 19 June 2007
Blencathra part 2: the sky for perspective
The first area I usually tackle in a shot like this is the sky. For me it sets the tone of the whole shot and is the best way to give a great sense of depth to the final print. When looking at similar images from others I often think that the total impact is lost from a wishy-washy (technical term) sky.
I find cloudy skies quite easy to get good results. There are smooth tonal transitions built in which makes noise reduction, spotting etc quite easy. Soft edges abound so sharpening isn't critical. Most of the colour information is at the high end of the dynamic range and so, as long as I've not blown the highlights (not really an issue when the source is film) there is plenty of scope for opening the contrast with curves or equivalent.
Here are the steps I took with this particular image (mostly working in Lightzone, my preferred editor):
Slight colour & white balance adjustment - there as quite a blue cast to the whole sky, which didn't quite work for me
Increase the contrast in 2 steps: first with a Zonemapper to pull the darker regions down (as with S-curves in PS) and then a small amount, large radius USM (for micro contrast) - here I used A.R.T. 20:100:0.
Finally, a slight lightening of the 2 dark areas on either side of the sky, to stop the dark over-powering the whole thing.
The tops of the hills visible here have had no adjustments yet.
Once done, I also took a single pass B&W filter, to see in monchrome will work. In general, I pick lack and white for images that are largely about tonal variation rather than strong colours. this is a candidate. Here's the result before dodging and burning:
Finally, a tip for large images in Lightzone. Those who use LZ regularly will probably know that it's not too great with large images (100MB+) so a 300MB 16-bit LF file is going to make it struggle. To help it cope I use the crop tool to isolate the part I'm working on (hence the crops in these samples), or even a section of that part (say just the right hand side of the sky). that cuts down the size of the working file. Once I'm happy, I disable all the aadjustments, reset the crop and then crop the next section. The last step will be to activate all the adjustmetns together. I just need to take care that I do occassional checks between adjacent regions for compatibility (to avoid harsh transitions). this way, LZ works well, and handles the final adjustment well. What seems to slow it down is all the intermediate work on the entire image while editting.
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03:42
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Sunday, 17 June 2007
Blencathra part 1: preparing the scan
When I returned to review the original scan I'd made of the photo, I found that it was out of focus in large parts. probably due to me making the final scan at the end of a long scanning session. Over time te scanner heats up, thus warming and warping the original - only a temporary effect.
So I went back to re-scan it, retesting the focus height on the holder. I also tweaked the brightness, curve and black & white points. First scan was rubish - i'd forgotten to brush it for dust and so it was very dirty. rebrush, rescan, tweak the USM settings (I found my final scan frame and test section had different settings) and I was away.
this, to me, is the equivalent of RAW development in digital. I try and do as many things as I can at the first set to capture as much information to the working file as possible. that said, I am also only using a fairly light touch in each of the settings - if I overcook the settings, then the working file is much harder to work with.
The final steps in preparing the working file are dust removal (using Dust & Scratches in Photoshop on the affected areas), some noise removal (Neat Image) and a little USM (similar to the settings I use on RAW files). In this case I also aded a small amout (5%) of shadow lightening and similar level of mid-tone contrast.
Now the file is ready for the real work on the individual areas of the picture. In this cae I think about 5-6 in total: clouds/sky, foreground grassy area, one for each of the individual hills & spurs and finally the valley floor.
Next installment - the sky.
Posted by
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18:10
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Friday, 15 June 2007
Pushing the noise envelope
Steve Gillette, in a comment, provided a link about Kodak's new sensor filter array. dpreview are also carrying the story. Is this really true, or is something missing?
I did some thinking on this, and I'm not convinced they've got it nailed. The claim is that by using the luminance pixels noise is reduced. I'm sure it is - these pixels effectively capture 3 times the light of filtered ones. Then again, why didn't they go with an LAB type array, why use RGB as well as luminance?
Then there is the resolution thing. Without colour resolution, the luminance "resolution" is either good for B&W or is just noise in itself. (If one wanted B&W, then one would not need the filter array anyway.) With colour pixels now spaced at 4 sites, compared to 2 sites for a Bayer array, the resolution that can be offered is only going to be that of a sensor with a quarter the pixels. Any interpolation is just guessing, it doesn't provide true resolution. If there were only a quarter of the pixels, noise would be inherently lower as the sensors would be that much larger. I'm sure that the extra interpolation will lead to colour fringe effects. Physics getting in the way again.
Of course, Kodak also have some fancy software algorithms to go with the new array which I'm sure helps with noise reduction but that could well be the crux of this working. then again, Canon are doing a really good job with high ISO performance (in large sensors at least) and there must a lot of algorithms involved there. I'm sure I read somewhere that Canon are also increasing the sensor site size by reducing the size of all the other stuff on the chip: less gaps, bigger sites.
Posted by
doonster
at
15:23
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Thursday, 14 June 2007
How much resolution is enough?
For me, I'm trying to capture enough of what I see to express in print what I felt & saw in reality. Sometimes that means a lot of detail, sometimes not.
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21:42
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Tuesday, 12 June 2007
The definition of artistic terms
Posted by
doonster
at
17:45
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Labels: Thoughts on art
Further thoughts on scanning resolution
I mentioned in the previous post that I ran a series of resolution tests at 1200dpi multiples. This was based on the received wisdom that I had on sticking to multiples of the scanners native resolution. I then discovered that the scan settings can be used to set an output size and resolution, the software doing the rest. I gave it a go.
I picked a given output size (55cm, IIRC for a 60cm print) at 300dpi. That led to an odd enlargement factor. tested the results - I couldn't really pick up any difference pixel peeping. maybe a slight degradation at 100%, certainly nothing that'll show up on print. This will simplify my workflow: get a general crop from the pre-scan, set the desired output & away I go.
The other thing I've been pondering comes from Paul Butzi's post on digital versus medium format. I responded that I reckoned MF could do better. This is based on the resolution testing I outlined below. If I can scan a 645 (56mm wide) film at 3600dpi, that would yield 670mm (26") image at 300dpi print. Larger at 4800dpi. I might imagine that this sort of enlargement would push optical enlargement (darkroom) but seems well within the bounds for scanning to digital today. I've seen some 5D and M8 files up close and they are very good, but not as much detail as I might get at those scan resolutions. Of course, if the film isn't up to it in terms of grain etc the point is moot (at ISo400 I'd reckon on digital winning, no problem). If I'm still getting extra detail at 3600dpi then that really opens the window of opportunity for enlarging film.
There are, of course, other factors relating to colour & contrast etc but for out and out resolution I think current scanner technology is keeping film in the hunt (if you've got the patience for the lengthened time required for film).
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doonster
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06:28
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Getting the most from a scan
This past week I've been working on scanning the LF work from my trip to the Lake District. It's been a voyage of discovery. As part of the initial work, I've been experimenting with getting the best from my scanner (an Epson V750 Pro flatbed), working through the vast array of variables on offer with the SilverFast scanning software it came with.
This is what I've found (so far):
Resolution - the scanner has 2 lenses - 4800dpi and 6400dpi, with output up to 9600dpi. Obviously for a 4x5 sheet I'm not going to go that high but the question is how high and is there some sort of optimum? I ran tests at 1200, 2400, 3600, 4800 dpi (on small sections - the last would be a monster file if I tried the whole image). I was looking for maximum amount of detail. At 1200 it's useless at any size - a lot of pixelation, limited detail, only good for document scans. 2400 renders good detail, smooth at 100% on screen. 3600 yields more detail than 2400, again smooth results. 4800 shows no more detail that 3600 - it's effectively a native enlargement. I think at 3600dpi it could be getting to the limit of the film.
Focus - the film holders can bet set at different heights to get optimum focus. This is important. In focus 2400 is as good as out of focus 3600. It's not just in clarity and detail, colour saturation and contrast are better too. Interestingly, the height settings for the 6x9 and 4x5 holders work out different. Not sure why.
Sharpening settings - there is a huge array to pick from. In the end I've settled for a light USM setting as giving consistently good results across the whole image. As I'm using fine grain film (Fuji Astia & Provia 100) grain effects are limited and easily removed in processing.
Number of passes - this thing can do up to 16 passes. I tried up to 8. There was slight improvement from 1 to 2, nothing noticeable beyond that. I tested by scanning a dark area then expanding with curves until near posterization. No real difference in noise that I could tell beyond 2 passes. Downside of lots of passes is the film gets hot and starts to buckle, seriously degrading results.
Dust & scratch removal - Digital ICE is built in and there are a couple of other options. I'm not touching them for the large stuff. It's easily removed in processing if I clean the surfaces before scanning. I found ICE froze the computer when trying an entire 4x5. Cleaning up only takes 5 minutes - I'm using selective application of dust & scratches tool in PS.
Would I want a drum scan? Can't see why. I get fine resolution towards the limit of the film, scanning to easily produce 40" plus enlargements from a 4x5 with smooth tones, limited grain and good saturation and contrast. I'm finding I need very little processing to get excellent results.
Explanation of the crop with which I've illustrated this post: this is a detail from one of the shots I've been working on (straight from the scan with a little extra sharpening). it shows a building amongst the trees in the valley. What's the big deal? I've been to this spot many times and didn't know it was there. I'm pretty sure I can't see it with the naked eye yet I'm picking it up clearly with a 120mm lens on 4x5 (that's fairly wide) and easily picking it up on the scan. Does one need better results than that?
Posted by
doonster
at
05:51
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Saturday, 9 June 2007
Anton Corbijn on Anton Corbijn
I've just watched a documentary on Dutch TV about Anton Corbijn, photographer to the rock music world. I'd not heard of him before (shame on me, really) but have seen many of his images. Pretty much anyone who's made popular music in the last 25 years, and many more besides, has had their photo taken by him.
I like the gritty, grainy style he has and the way it draws interesting character from his subjects.
He had some interesting things to say, too (I paraphrase in translation here):
On technique: my technique is quite sloppy and that results in a lot of out of focus ("unsharp" as it is in Dutch) areas. I don't think this detracts from the overall quality of the image, the composition, the subject.
On light: I like the light at the end of the day just before it gets dark. The contrast is even and the scene flat which leads to interesting and strong composition.
On celebrity: I like to photograph beauty but not in the traditional, glamorous sense of celebrity. I like to draw on the beauty of character, ideas, personality.
On fame: I used to think of myself as a sort of underground photographer, away from the mainstream. Now I have become the mainstream but I hope that doesn't mean I've lost the inherent qualities of the image that I had before.
Looking at the woks presented in the programme and a quick search on his images I must say it is one of the strongest styles of "people photography" I think I've ever seen. Well worth checking him out.
Posted by
doonster
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17:02
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Labels: Photographers
Sunday, 3 June 2007
In search of a challenge
I realised this evening that the thing that keeps me enthused about any particular activity, and life in general, is the taking on of a challenge. Something that will push me to learn new things or improve myself in some way.
And so it is with photography. I'm never happy producing pictures of the same consistent quality time after time, or focusing on particular subjects. i like to push further, try harder, constantly get better quality images. that holds for both technical as well as artistic content. It might also explain some of my "shiny kit syndrome": never satisfied with the quality I'm getting, I'm after something more. hence the purchase this week of 2 new lenses (the canon EF17-55 f/2.8 & EF70-200 f/4 IS, both very nice) to improve areas of my work. Also explains why I bought an LF camera.
There will come a point when I'm happy technically and will truly focus on content. Hopefully with the next 12 months or so. Not that I'm not striving in that area. too.
A reason I came to this realization was reflecting on my cycling. Now I have a bike for every occasion, it is down to me to improve my fitness or take on different challenges (greater distances, touring, new countries) - I focus on turning the pedals and completely forget the equipment under me.
Posted by
doonster
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03:17
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Labels: Thoughts on art, Workflow

























