You've asked to clarify 'what is the actual problem with the ovf'... The problem is that with a given set of parameters being equal, if you take two shots, one using LV and the other using OVF, the focus will not be the same. In MANY cases, there ar...
I've had several cameras, from Nikon as well as Canon, including 20D, 30D, 40D, 7D and 90D. The 90D is the ONLY EVER CAMERA that I've need to perform AFMA. The 90D was marketed as the replacement/upgrade to the 7D2, which I was going to buy, but it...