Is F50/1.7 front element large enough to be reverse mounted on top of Tamron SP90/2.8 ? SMC-M 28/2.8 works only when Tamron is set to f2.8, beyond that I get vignetting. Which lens is recommended for reverse mounting ?
I see that it helps if I focus the Tamron as close as possible but not by much. Is it good or bad the fact that Tamron has deeply recessed front element ? Thank you !
