Hi, just wondered about peoples finding of shooting on hot days. I recently spent a day with a professional photographer in a hide. We were shooting at range across grass & dry river bed to some water with herons. It was a practice day for me with the guy to learn technique etc. I want to make sure I know as much as I can about wildlife photography before I go away in a couple of weeks. I was using my 5div & 100/400ii. I took around 400 shots all of which were simply put not sharp enough for use. I was using a combination with and without 1.4 extender, bean bag and/or high shutter speeds. The image quality was poor enough that I have returned the combo to canon for looking at. Steve who I was with was shooting a d500 and 200/500, he clearly had a lot more reach than me but the quality of the images on his camera were so much better. Literally in a different league, not talking about framing or composition just clarity. You could zoom right into the eye with the d500 with little blurring yet the canon combo if you zoomed right in, it was considerably poorer. My question is do you think the issue could be the extra 10mp combined with the weather conditions or camera & lens issue or is it the Nikon is that much better in the conditions? If it was user I would expect at least to get a few sharp pics out of 400+. I cannot upload any pics as we are having trouble with out internet connection.