I'd have to do an invantory, but I believe I own 10 A/F/FA lenses, at
least 20 or more K and M lenses, 6 or more M42 lenses though at least
half of those are different flavors of 50/55mm lenses, three T
interchangeable mount lenses and just one TX interchangeable mount
lens. Yes I have a lot of lenses.
On 5/23/2012 9:58 PM, Larry Colen wrote:
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"<hifis...@gate.net> 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
hifis...@gate.net
-----------------
-----Original Message-----
From: pdml-boun...@pdml.net [mailto:pdml-boun...@pdml.net] On Behalf Of
James King
Sent: Wednesday, May 23, 2012 8:48 PM
To: pdml@pdml.net
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
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Larry Colen l...@red4est.com sent from i4est
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Don't lose heart! They might want to cut it out, and they'll want to avoid a
lengthily search.
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