I have a Nikon D300s. My main lens is Nikon 16-85. I mainly shoot JPEG. I shoot some landscape and old railway stations, tracks etc. Somebody told me that I would not see a lot of difference between full frame and crop when shooting during daytime. The real difference would be when shooting in very low light situations. Is there anyone on the forum that can tell me about this. I was planning to upgrade my D300s to Nikon D600 and Nikon 24-120 f4.