I would disagree with this. The difference between SMC and Supertaks is Nearly nil with these low element long telephotos. It doesnt practically matter. The Later Pentax tele lenses like the SMC-A* 300/4 blow away the earlier SMCK 300/4 Or takumar 300/4 lenses on CA elimination due to a much improved optical design, nothing To do with coatings at all...
>From what I recall, and it's kinda sketchy, the takumar 300/4 and 500/4.5 Both have fairly visible CA on APS digital, the 400/5.6 is better in that Regard. The A*300 is much better than the ST/SMCT/SMCK 300/4 with respect To CA elimination. Its way smaller too. If you can afford the A*300/4 For roughly $500-700 in nice shape, I would recommend that one very heavily, but the others Are going to need CA correction in post processing to get good results, Except maybe the 400/5.6 screwmounts may be OK, I just dont recall how Good the 400 is other than its better than the 300 and 500mm screwmounts On CA. The M*300/4 should be as good as the a* version too, it just dont Support AE (no "A" setting on the aperture setting ring). jco -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of Bob Sullivan Sent: Wednesday, May 27, 2009 8:49 PM To: Pentax-Discuss Mail List Subject: Re: Big-telephoto advice Tim, I think with the SMC coatings, they are virtually indistingushable from the A series lenses, maybe even the FA's. Without the SMC coatings, get a good lens hood! The SMC is best for reducing flare in backlighting. I think the Super Takumars are the series before the SMC Takumars. Regards, Bob S. On Wed, May 27, 2009 at 7:28 PM, Tim Bray <[email protected]> wrote: > On Wed, May 27, 2009 at 5:25 PM, Bob Sullivan <[email protected]> > wrote: >> Tim, >> A screwmount SMC Pentax 300mm f4 or 400mm f5.6 would be great. Most >> everyone else passes on these as too old, their problem! > > Those 300 screwmounts (under the Takumar name, right?) are all over > the place in the non-SMC version, harder to find with the SMC. How > big a deal is the coating? -Tim > > -- > 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. -- 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.
