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.
