Greetings everyone !
I recently (today 06/28/2018) received a new lens, as you read in the title, the Zenitar-K 16mm f/2.8, but i'm facing problems with it. First, I read somewhere that you're unable to achieve infinity focus with a filter on the lens (the back filter) so I put the transparent filter, so yeah it's better but i'm still unable to infinity focus :c (I also niticed that there's a gap between the... hood? / Frontal part of the lens and the focusing ring. From what i've seen on the internet that seems pretty normal but I just wanted to say that just in case.
And the most important problem, my K30 is unable to control the diaphragm, sometimes it works in live view but not every time... like 1 time on 4 (did I said this right ?). When I press "optical previsualisation", nothing happens, is that because it lacks contacters so the body thinks it is impossible to operate the diaphragm ? (I specify that I authorized the use of the diaphragm ring)
Anyway, if someone can help we with one of these problems, I'll be very grateful.
I highly apologize for my mediocre English too
\/ an example photo, I was at the infinity. (in red = the "in-focus" area) \/