Further research (Boz's K-mount pages) informs me that there are two versions of M28/2.8. I wasn't aware of the early version. The later version is in fact the same optical formula as the A28/2.8, and has some similarities to A lenses unlike the early M lens which is has all the typical M features.
Although Boz states that the M version 2 was rare, it is the version described in the lens booklets that came with my ME Super when it was newly purchased, and is the reason I stated that M and A versions of 28/2.8 are optically identical. Scott should determine which lens he is referencing. Consult Boz is my advice. http://www.bdimitrov.de/kmp/lenses/primes/wide-angle/M28f2.8-i.html http://www.bdimitrov.de/kmp/lenses/primes/wide-angle/M28f2.8-ii.html http://www.bdimitrov.de/kmp/lenses/primes/wide-angle/A28f2.8.html There's an F version as well: http://www.bdimitrov.de/kmp/lenses/primes/wide-angle/F28f2.8.html regards, Anthony Farr > -----Original Message----- > From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of > Dario Bonazza > Sent: Thursday, 31 July 2008 4:39 PM > To: Pentax-Discuss Mail List > Subject: Re: M28/2.8 vs. A28/2.8 > > Anthony Farr wrote: > > > > I'm not Margaret, however.... > > Me neither. > > > Optically, these lenses will be the same formula. > > Sorry Anthony, but.... NO. They are very different lenses (both formula and > performance have very little to share). > > Recalling a 10-years old comparison, the M lens wins very easy when > considering 3D effect, while the A lens outperforms its counterpart about > center-to-edge performance (resolution/sharpness). > Hence: > 1 - Choose the M for shooting real-life subjects in their environment > (they'll pop out from the background) without worrying too much about > resolution at edges. > 2 - Select the A lens for shooting targets, repro work, architecture, > graffiti, and the like. > > > The M lens will be better built. > > Never noticed a difference worth considering. > > > The A lens will have better coatings therefore better flare resistance. > > That's possible, but I can neither confirm nor deny. > > Dario > > > -- > 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. -- 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.
