10-19-2010, 12:12 PM
The RGB sensors in digital cameras behave different than film: As soon as you overexpose the green channel only, which may happen when shooting very green subjects, the color mix of green (clipped due to overexposure) with red and blue (which are not clipped in this case) is out of balance and you get weird greens, that have too much blue and red in.
As Walter said, you should check an RGB histogram to be sure no channel is clipped.
Another issue is how the in-camera processing renders greens. This is of course only relevant if you shoot JPEGs. I can't speak for Canon, but Nikon manages to render really ugly greens by default; messing with the in-camera curves or shooting RAW and using a third party converter can be mandatory depending on your taste there.
And of course there is white balance. Just shoot RAW and adjust it afterwards. Even if you don't like post-processing at all, being able to correct white balance is reason enough to shoot RAW.
As Walter said, you should check an RGB histogram to be sure no channel is clipped.
Another issue is how the in-camera processing renders greens. This is of course only relevant if you shoot JPEGs. I can't speak for Canon, but Nikon manages to render really ugly greens by default; messing with the in-camera curves or shooting RAW and using a third party converter can be mandatory depending on your taste there.
And of course there is white balance. Just shoot RAW and adjust it afterwards. Even if you don't like post-processing at all, being able to correct white balance is reason enough to shoot RAW.