Quote Originally Posted by TheFlyingCamera View Post
I think the 355 G-claron would be pushing the very limits of coverage if not past it for 16x20 at most apertures, certainly at wide open f9. 14x17 and 12x20 have very similar diagonals - 22 vs 23 inches, so any lens that covers 14x17 would most likely cover 12x20. But 16x20 is a different animal.
Just to clarify what I meant was if the 355mm g claron was at f9, would cover 12x20 and 16x16 (plus everything in between 13x19, 15x17 etc...)