The usual error that I encountered with my previous autofocus lenses was the backfocus/misfocus issue but today all my shots focused perfectly. The focusing process took me around 3-4 seconds currently but I believe it will be faster in the future.
Birding the in-flight birds is be a bigger challenge for me but it has been my challenge as well when I was using my autofocus lenses in which the lens would hunt for the bird/subject to focus and usually at the end of the day, I did not score the shot well.
Minolta MD 75-150mm F/4 at 150mm F/5.6
Minolta MD 75-150mm F/4 at 150mm F/5.6
Minolta MD Tele Rokkor 200mm F/4 at F/5.6
Minolta MD Tele Rokkor 200mm F/4 at F/5.6
Minolta MD Tele Rokkor 200mm F/4 at F/5.6
Minolta MD Tele Rokkor 200mm F/4 at F/5.6
Minolta MD Tele Rokkor 200mm F/4 at F/5.6