...the composition in portraiture and figure studies may be constructive rather than selective, though it will be found that selective composition al… - Arthur Hammond

An ordinary photographic plate or film is abnormally sensitive to the light rays at the violet end of the spectrum and is strongly affected by the ultra-violet rays, which are invisible though they are present in sunlight, but it is practically insensitive to red and to the colors at the red end of the spectrum. Therefore, an ordinary plate sees red as black and is affected only very little by orange and yellow, so that those colors appear very dark while, on the other hand, being so sensitive to blue and violet, these colors are made to appear too light. That is why we can use a red light in the darkroom, as the plate is affected, practically, not at all by red light.

The eye is, practically, a long-focus lens. It covers only a comparatively narrow angle, and in order to see as much as can be included in a picture made with a short-focus lens we have to move the eyes a little and look at the various objects in succession.

Nature is interesting at all times, but, as a general rule, very harsh and glaring sunlight, when the sun is high in the heavens, should be avoided, because at such times there is an often an utter lack of relief, roundness and modeling in the trees and other objects.