The various F and FA 100-300 have varying reputations. I recently got the reportedly best version, the FA 100-300 f4,7-f5,8. I got it in the hopes of replacing my Vivitar 70-210 f3,5 which, even though amazing, is bulky and MF (which means the wife never uses it...).
I was not sure what to expect from this lens. It's sharp enough, has low CA, but in some situations I found that it struggled to give me sharp results. I have come to understand that handholding 300 mm is not a free lunch, and my results have improved. Here is an example of what this lens can produce, regarding sharpness and colours.
I'm keeping it
