On 13 February 2012 14:30, Subash <[email protected]> wrote: > On Mon, 13 Feb 2012 06:25:36 -0800 > Godfrey DiGiorgi <[email protected]> wrote: > >> The Takumar K 135/2.5 is a bargain grade lens with single coatings. I >> found it a fairly poor performer until stopped down to about f/8. The >> SMC Pentax-M 135/3.5 is the one to look for. >> >> I have the SMC Takumar 135/3.5 M42 mount lens, it is a terrific >> performer too. > > thanks Godfrey. the one i saw is not the Takumar. it is a SMC-K > 135/2.5. is it optically same (as poor as) the Takumar?
No; different formulae. the Bayonet Takumar is 4 elements / 4 groups http://kmp.bdimitrov.de/lenses/primes/_non-SMC/index.html and the SMC Pentax 1:2.5/135 is 6 elements / 6 groups http://kmp.bdimitrov.de/lenses/primes/tele/index.html -- Eric -- PDML Pentax-Discuss Mail List [email protected] http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.
