Sharpness issues

Sharpness issues

I have recently been having real difficulties with getting really sharp images with my 500mm f4 lens. I have tried different camera bodies and re-calibrated the lens using Lens align with Focaltune software, with each of them, both with and without the TC-14...
The Nikon 1V3

The Nikon 1V3

Throughout the PanAm Games I had, as my constant companion, a Nikon 1 V3 mirrorless camera along with a 10-30mm lens and FT1 lens adaptor, courtesy of Nikon Canada. This camera boasts an 18megapixel 1″-type sensor with no AA filter (offering a multiplication...