Bill MN wrote:
Recently I purchased a book over 700 pages on how to ID trees and shrubs. The pictures were taken with a Nikon camera, with no post-processing except crop. Using a reference book like that the pictures have their natural color. I don't use PP anymore except to crop and sharpen. Mother nature dose a better job with color. I only like pictures straight out of the camera. If they don't look good I didn't have the camera set right.
I forgot to tell you he used a Nikon film camera.
Natural, really? What type of film? Kodachrome, Ektachrome, Agfachrome, Fujichrome, Fujicolor, Kodacolor, Vericolor II, Vericolor III, and on and on. Every single type and subtype of color film has its own look. The professional types of film even came with suggested CC filter pack for each patch of the film. I would imagine that it took him years to collect so many photographs of trees, not likely he used the same film for all of them. Like another person pointed out, photography is not reality but an abstraction of reality. Sure you can calibrate your film or digital to match the red on a Coca-cola can, but what is the standard for a specific tree? White balance can be applicable to film, but it is just that a balance to white, every film has a different response to colors curve. They all have a look. Kodachromes usually warm, Ektachromes usually cool.
When I worked at a museum we would by film by the cases of the same batch so it all would be the same for several months or years. And I should point out even Black & White films all differ (tone curves, contrast, grain, etc.); Tri-X, Plus-X, Panatomic-X, Technical Pan, T-Max 100, T-Max 400, HP5, FP4, negatives all look very different (to me anyway).
Your book is similar to a situation I had in university once ages ago. I had a really loopy ecology professor who had been photographing the same area in Chino, CA near the prison for years looking for changes in vegetation. In class he was showing us slides of an area that he had photographed in 1968 and 1978 and wanted us to note the differences in the colors of the vegetation, hue and tone. Yes, there were differences. But since I knew somethings about photography I asked him, "Did you use the same type of film, Kodachrome 25 or say Ektachrome 40, and film from the same batch?" He was completely befuddled. He had no understanding of what I was asking. He was drawing conclusions based on non-sense. Color photography in that way can rarely be used for scientific purposes unless color patches and a grey scale are included in the image. You may remember how they calibrate the cameras on the Mars Rovers -- there are US Flags and NASA emblems and color standards painted on the vehicle.