This is the first time I've bothered to count them all, but it seems
that I currently have 31 K-mount and M42-mount Pentax lenses of focal
length 50-55mm:
A50/1.2
A50/1.4 x2
A50/1.7 x3
A50/2.0 x3
A50/2.8 Macro
F50/1.4
F50/1.7
FA50/1.4
FA50/1.7
FA50/2.8 Macro
K50/1.2
K50/1.4
K55/1.8
K55/2.0
M50/1.4
M50/1.7
M50/2.0 x2
M50/4.0 Macro
ST50/1.4
ST55/1.8
SMCT50/1.4 x3
SMCT55/1.8
SMCT55/2.0
As with others here, most of these live on Pentax film bodies. I
only use the FA50/1.4 with any regularity these days. They do make a
nice collection - I think I have at least one of every 50mm K-mount
lens ever made except for the F50/2.8 Macro. Maybe a nice one will
turn up on Eeekbay someday...
Regards, Jim
