Originally posted by fireforsave I was wondering if anyone has owned and compared these two normal 1.4 Vivitars. The 55mm has a 55mm filter thread and is only found in M42. The 50mm has a 49mm filter thread and is only found in Pentax K. I'm building a set of Vivitar lenses and need a ~50mm. The 55mm is a rumoured Tomioka design but researching that leaves a dead end. Overall I just want to know if there is a significant optical difference between the two. Thanks for any help!
the only thing I can contribute is having a couple of other 55/1.4 lenses that are supposedly Tomioka designs - a Cosina 55/1.4 and a Porst 55/1.4; both are M42...
the Cosina is excellent, while the Porst is a middling mediocre...
I cannot comment on the 50mm lens as I do not have any....
not even allphotolenses has much on either:
The Vivitar 50 1.4 VMC Auto Lens. Specs. MTF Charts. User Reviews.