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.
