I was out at Grafton Lakes State Park over the weekend. I was hoping for some color but the foliage was well past peak. The sky was overcast, which is perfect for shooting in the woods because you don't get the contrast between sun and shade.
A tripod is a must, of course, due to the low light level but the soft light can really pick up colors. In this case green. This shot of a fern was made with the 5D and the 24-70 lens.
Canon EOS 5D, EF 24-70 f/2.8L at 70, ISO 100, f/8, 1/15 sec.