Upload & Sell: On
very interesting. My copy appears to be in focus at the infinity stop, otherwise my Milky Way at f/3.5 wouldn't be as sharp as it is, but now I really need to double check. Perhaps I left some sharpness on the table with those shots. The f/4 night shots I took at the infinity setting are not significantly sharper, just a little less coma in the corners.
I know my 600/f4.0 isn't at infinity when you hit the mark on the focus scape, but that's normal for a long tele, just with temperature variations.
My first 16/3.5 was a factory AI'd version (that I sold to Curtis), but can't remember if it had the same characteristic. It could also be my mount on my d800 I suppose, but I see the same thing when using them on my A7R. Makes using the focus scale at distances less than infinity a challenge because the scale is really really off up close.
I'm curious to know what you find with your copy - is your copy a true AI version or is it a factory AI version?