using a 50mm lens on a bellows would only be good for extremely high magnifications at close range (lens to object). Most bellows lens are 100mm for this reason.
-- J.C. O'Connell (mailto:[email protected]) Join the CD PLAYER & DISC Discussions : http://tech.groups.yahoo.com/group/cdplayers/ http://launch.groups.yahoo.com/group/cdsound/ -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of P. J. Alling Sent: Wednesday, December 29, 2010 5:54 PM To: Pentax-Discuss Mail List Subject: Re: SMC A 50mm/f1.7 The 50mm f1.7 has the flattest field of focus of all the non macro 50-55mm lenses Pentax made, up to the DA series lenses, for those I cannot vouch. It's the recommended lens to be used with the Autobellows for that reason, (if you're not using the actual Bellows lens that is... On 12/29/2010 5:02 PM, Stan Halpin wrote: > A 2006 comment from a recently-departed list member: > > "All the Pentax 50mm lenses in the f/1.4 to f/2 range are good lenses > (perhaps the K55mm f/1.8 is the exception, it isn't all that wonderful > until well stopped down). Of all the ones I have, I think the K 50mm > f/1.4 is the "sharpest", the M 50mm f/1.4 is the "creamiest" (for lack > of a better term), the FA 50mm f/1.4 seems most excellent, but I > haven't shot a lot with it yet, and the 1.7s and f/2s in whatever > series all seem very good as well." > > This is a good summary of everything I have read and seen on this > topic. In short, the Pentax 50mm lenses (as with most if not all > manufacturers) are all good quality lenses with only the subtlest of > differences among them. I would trade an M series for an A series in > order to get the extra functionality on more modern cameras. I would > trade a 1.7 for a 1.4, or a 2.0 for a 1.7, to get the extra speed. But > the image quality is just not a factor when considering which lens or > lenses you should own in this class of lenses - they are all good. > > stan > > On Dec 29, 2010, at 4:02 PM, Eric Weir wrote: > >> I've been relying on Stan Halpin's website to a large degree in >> deciding which lenses to buy. I've got an M 50mm/f1.7. There's an A >> 50mm/f1.7 on a black MX that I've been looking at. >> >> While that lens is listed on Stan's site, there is no information on >> it. Any opinions about it -- image quality-wise? >> >> --------------------------------------------------------------------- >> --------------------- >> Eric Weir >> Decatur, GA USA >> [email protected] >> >> >> >> >> >> -- >> 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. >> > -- Where's the Kaboom? There was supposed to be an Earth-shattering Kaboom! --Marvin the Martian. -- 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.
