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12-16-2007, 09:19 AM   #31
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Posts: 297 is 75 mm....

12-16-2007, 10:04 AM   #32
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QuoteOriginally posted by hll Quote is 75 mm....
No, it is still a 50mm.

However, it gives the same *angle of view* a 75mm lens would give on a film SLR. See this: Crop factor - Wikipedia, the free encyclopedia
12-16-2007, 10:16 AM   #33
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after reading this thread this a.m. decided to dig out my 50/1:1:2, don't use it much anymore, but it certainly has taken a beatin' over the years.........image shot f/2 1/20th iso 200 hh
guess it still wrks ok tho' there was some noise .....thinking maybe of replacing it......

Last edited by gpaual; 01-26-2008 at 04:16 AM.
12-16-2007, 10:18 AM   #34
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QuoteOriginally posted by tux08902 Quote
Well, there are similar models in each of the series. Would there be any significant difference between the Pentax-M, Pentax-A, and Pentax-F versions of these lenses, other than the AF in F version.
If I recall correctly, the 1.7 is essentially the same lens optically right from M to A to F to FA series. Same number of elements/groups, same configuration. The only difference is in the electronic bits. For the 1.4, I think the optical design is different between the M series and the newer lenses.

All that aside, any of the 1.4's or 1.7's are great lenses. I've used the M 1.7, A1.7, M1.4 and FA1.7 at different times, and can't say anything bad about them.


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