I don't know which lens you have but I assume that there is either simply more metal in the m42 lens, or
pentax substituted aluminum for brass where it wasn't critical to avoid binding, to reduce weight. .


Rebekah Gonzalez wrote:

well you see, the reason i asked was that i had recently wandered into my
local camera shop (oops) and i just happened to have my camera with me(oops
some more). so i was looking at this screw mount that had just been sold to
the store and although it was technically the same lens as my own (50mm 1.4)
there was definitely a weight difference. any suggestions as to why?

rg2






--
I can understand why mankind hasn't given up war. During a war you get to drive tanks through the sides of buildings and shoot foreigners - two things that are usually frowned on during peacetime.
--P.J. O'Rourke





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