I've looked everywhere and can't find a damned thing about sex - I must have missed a topic... ;-)
You just need to searh for fucking, not "sex" :-)
Vk I have the Konica 40mm and it's very versital (espcial on anamorphic adapters),a little soft ,but in a good way wide open .. has a vintage feel to image .. also we talked about the vivitar close focus 28mm f2.8 is very nice lens for the money.. the Ziess 58mm biotar f2 with the many blade versions (I think 15 of them) is very good (but usually exakta mount).
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