energypolice wrote:I believe there should be no post-processing done on nature photos because it will lead to the "slippery-slope" syndrome
That statement itself leads to a slippery slope!
Steffen makes a good point regarding various purposes for photography. Photography of our environment is by default assumed to be documentary. Whether or not the artist had that intent, the fact remains that when most people see an image of an animal or other part of nature, they would like to believe that what they're seeing is real. This is where the "slippery slope" comes into play: should the artist have to attach a statement to every image guaranteeing its veracity? In the PJ world a lot of effort has been put into setting the standard as images being "true", requiring labels such as "photo-composition"/"photo-illustration"/etc. But not everyone wants to follow those standards.
For me there are two primary purposes of my nature photography: accurate portrayal of the environment, and producing "pleasing images". Wherever possible I try to fit both purposes, but there are often exceptions. Sometimes I produce images which are
not accurate portrayals (as I've cloned something, or used colours that are enhanced a bit too much, etc) but that's the exception and I try to either label the images as such, or use them in contexts where there is no confusion.
energypolice wrote:What you see is what was shot! (No PP)
These can be conflicting statements. To accurately portray the scene you need to apply various manipulations of the image, and this applies to film as well as digital photography!
When someone shoots with slide film it's very easy for them to think that it's all in the instant of capture. But just because they've chosen their filtration and film then (along with possible push/pull-processing choices) that doesn't mean that it's the only valid means of producing an "accurate" image. Even within the constraints of shutter speed and aperture, your choice of film, filtration, WB, contrast, saturation, etc will all affect the way the colours and tones are rendered. Your choice of film, imaging sensor, sharpening (even when printing in the chemical darkroom) also affect the final image. Colour filtration and film choice (Velvia has been mention, but it's not the only example) can have a huge impact on the final image, as is often seen in sunset images for example.
The process of producing an image extends from the instant of image capture through to the final production of the image. You may decide to give up control of some of those areas (e.g. to the slide processor, or to your camera's JPEG compression) but that is your choice and does not invalidate the choices of others.
In fact I think the term "post-processing" (PP) puts unnecessary emphasis on the "post" bit: it's all part of the processing flow.
However, the manipulations I've described so far (i.e. "global" things such as colours, tones, cropping) are not the only types of processing that can be applied. A "big" one that springs to mind is the issue of cloning. And
that's a slippery slope when it comes to Nature/documentary photography.
leek wrote:I can understand your desire to refrain from cloning and other manipulation though, but rules are meant to be broken and I have been known to clone out the odd twig for compositional reasons...
One of the issues here is that of deceiving your audience: if your audience finds that you've manipulated the content of your images and they had assumed that they were real, you will lose credibility. Witness the outrage when it was realised that many of the images in Art Wolfe's "Migrations" book had had animals inserted into the scenes.
And what if someone produced an image of a mammal wandering along a bush track with its young beside it, when in fact this animal never brings its young to the ground and carries them on its back through the trees. Did the photographer make a "pleasing" image composited from various source images, or is it in fact new behaviour that will excite the scientific community (or confuse a future student who ends up using the image as source material in a science project)?
Sometimes these veracity issues are obvious (polar bears and penguins together on the ice?) but so often we don't know 100% about a given natural-history subject (even when we think we do!) and choices one might make when cloning and/or compositing are likely to produce "false" scenes, even if you don't know it at the time.
So in general cloning is a no-no, but remember that the same tools (e.g. Photoshop's Clone Stamp Tool) are still useful tools (e.g. in dealing with dust bunnies, film dust/scratches, etc).
The question of photographing "wild" animals vs. photographing constrained animals (e.g. in zoos) is closely related to the above. For example the behaviour of many animals in captivity is vastly different from their natural behaviour. The images you capture in a zoo may be pleasing images, they may be accurate portrayals of the scene that was in front of you, but
they may not be accurate portrayals of the natural behaviour of the creatures!
Another area that can be seen as contentious is compositing multiple images. This can be in order to extend the dynamic range of the image in an attempt to provide a better reproduction of the scene our eyes saw, or it can be to produce a high-resolution composite panorama. As long as the photographer is confident that
the final image is an accurate portrayal of the scene then I think they can be valid "Nature" images. That doesn't mean that all such images fall into that category though! Such imagery is complicated by issues of moving subjects (animals, leaves, waves, etc) and changing light conditions as the image is not necessarily from an "instant" in time (but then does a 30-sec "single" exposure qualify as an "instant"?).
As with everything, it depends!. For instance I have taken stacked composites where all the images were taken within one second and I'm confident that they're an accurate portrayal of the scene.
Incidentally, similar issues apply to images taken with some panoramic cameras (with slits panning across the film) and scanning digital backs.
This is just the tip of a very contentious issue, and debate can rage over the details if you're not careful. I've tried to keep the above post focussed at the actual issues rather than getting caught up in examples (not that I'm always successfull in that!
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