I usually take pictures of flowers in my back yard because my mom loves them. I usually find myself dealinf with a problem in the red channel: more often than not, I encounter a problem with saturation of the reds in the highlights. I usually shoot in the morning or in the evening, because the light is less harsh and always use highlight tone priority.


Here's an example, first the whole picture, then a crop of an area involved in the problem.


canon XSi, 24-70mm, 1/320sec, F5.6, ISO 100, 57mm







Usually, some saturation and curve adjusting is enough to get rid of most of these phenomena. BUT, what would you suggest to prevent this kind of things happening?