Here's a review of the MC Revuenon 55/1.2 by Jens Roesner,
Same guy,
Porst Color Reflex 55/1.2.
Confusingly, 'Revue' as well as 'Porst' are just labels like 'Sears'.
My guessing is that the Revuenon is only of one make, and that's Tomioka, though some say it is from Cosina with Tomioka design. Looks like there are copies of this lens labeled 'Cosina'. It's got a 58mm filter thread. Quite good full open and nice from f2 onwards. I guess that jake.astig uses this lens, nice film pics Jake!
The Porst has many reports about
gummed up aperture blades. It's got a 55mm filter thread and 6 lenses and that makes it real soft wide open. I guess that cabstar uses this lens, distinct bokeh for sure!
Porst did have a 50mm 1.2 also (not 55mm), and that is a Fujinon in X-mount only.
Here +
here are some more pics from the two lenses on K100D.
All the best, Georg (the other)