Well, I wouldn't call you "most folks". :-) Jeffery
Sent from my iPad Jeffery L. Smith New Orleans, Louisiana USA On May 23, 2012, at 21:22, "J.C. O'Connell" <[email protected]> wrote: > FWIW, I have one digital slr and roughly SEVENTY K lenses and a few M42s > too. > > ----------------- > J.C.O'Connell > [email protected] > ----------------- > > -----Original Message----- > From: [email protected] [mailto:[email protected]] On Behalf Of > Larry Colen > Sent: Wednesday, May 23, 2012 9:59 PM > To: Pentax-Discuss Mail List > Subject: Re: New DA50/1.8 Plastic Mount > > > On May 23, 2012, at 6:33 PM, Jeffery Smith wrote: > >> I would hazard a guess that most people who buy an SLR have one lens. Not > guys like us, but everyone else. I wonder if there are stats on the number > of lenses there are for every body sold. > > That wouldn't tell you much. How many of us own upwards of 10 lenses? > > What you'd need is a distribution of number of camera bodies someone owns > and how many lenses they own. > > I suspect that it probably averages something like three lenses per body, > with 60% owning one of each, 25% owning one body and two or three lenses, > and 15% owning five or more lenses, about half of whom have two bodies and > 10 or more lenses. > > >> >> Jeffery >> >> Sent from my iPad >> >> Jeffery L. Smith >> New Orleans, Louisiana >> USA >> >> On May 23, 2012, at 20:24, "J.C. O'Connell" <[email protected]> wrote: >> >>> pentax used "modern" plastic on some filter rings of their f series > lenses. >>> those rings often crack and break off with age. Metal is better. >>> >>> ----------------- >>> J.C.O'Connell >>> [email protected] >>> ----------------- >>> >>> -----Original Message----- >>> From: [email protected] [mailto:[email protected]] On Behalf Of >>> James King >>> Sent: Wednesday, May 23, 2012 8:48 PM >>> To: [email protected] >>> Subject: Re: New DA50/1.8 Plastic Mount >>> >>> P. J. Alling wrote on Wed, 23 May 2012 09:20:38 -0700 >>> >>>> Lenses are a long term investment, at least they used to be, plastic on > a >>> bearing surface implies the opposite. No matter what plasticizers are > lost >>> over time and the material becomes brittle and subject to cracking. >>> Eventually something important will break. Heat will exacerbate this >>> process. If the lens was cheap enough to be disposablethat would be fine > but >>> it's not really. >>> >>> It ain't neccesarily so! I'm confident that the Pentax plastic lens > mount >>> is made of a modern engineering plastic; these are heat-resistant, often >>> self-lubricating, and do not contain volatile/migratory plasticizers. >>> Unless subjected to severe mechanical stress it's likely that they will >>> outlive the user. >>> >>> Regards, Jim >>> -- >>> 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. > > -- > Larry Colen [email protected] sent from i4est > > > > > > -- > 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.
