rmalarz wrote:
I would say you have a couple of things working against you. First, and foremost, the distance. That is quite a small subject at that distance. Next, the TC can introduce additional optical issues. It not only multiplies your focal length by 1.4, it also magnifies any optical aberrations by 1.4, as well. I'm not familiar with your camera enough to know if it is an FX or DX format. However, once we get to the projected image size, the number of and size of each photosite on the sensor is going to be a part of the issue as well. I hope this answers some of your questions.
--Bob
I would say you have a couple of things working ag... (
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Thanks for the info. rmalarz. The 7DII is a 1.6 crop. I have used the same lens/TC on my 5DIII (full frame) and got good results, although I have never shot at that distance.