Originally posted by Jonathan Mac
Smaller than the later f/3.5?
not dramatically smaller, but just enough...
Takumar 35/4
weight - 136g
dia x length - 53 x 33mm
filter ring - 46mm
Super/SMC Takumar 35/3.5 (depending upon version)
weight - 149 to 152g
dia x length - 56.5 x 34mm, some versions 57 x 34mm
filter ring - 49mm
and even the first k-mount 35/3.5 wasn't much bigger:
weight - 161g
dia x length - 63 x 36mm
filter ring - 52mm
(all specs pulled from PF lens database here:
Pentax Lenses - Pentax Lens Reviews & Lens Database )