Playing with camera and lens
I used my Nikon D300 which has a crop mode of 1.5 ,a Nikon AFs 80-400mm lens at a distance of 75 ft hand held which should then be at 600mm as a tryout for distance work.
managed to get this as a test shot for my own satisfaction mainly to see how steady it camera was
No editing just resize to post on here so I was quite pleased with the result
So as a comparison at 50mm
Normal eyesight is around 35mm