Plastic is good enough to be used in hips and knees.  I'm sure that a
lens mount will hold up fine.

On Wed, May 23, 2012 at 12:20 PM, P. J. Alling
<[email protected]> wrote:
> 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 disposable that would be fine
> but it's not really.
>
>
> On 5/23/2012 10:02 AM, Charles Robinson wrote:
>>
>> On May 23, 2012, at 8:25, Tom C wrote:
>>
>>> Come on Pentax! How else are you shaving costs?  Talk about making
>>> yourself look cheap.
>>>
>> I have no complaints with the nice crisp images coming from my all-plastic
>> DA 35 f2.4.  It seems to be holding up quite well and frankly I don't give a
>> rat's patootie what the mount is made of as long as it works.  And it does.
>>
>>  -Charles
>>
>> --
>> Charles Robinson - [email protected]
>> Minneapolis, MN
>> http://charles.robinsontwins.org
>> http://www.facebook.com/charles.robinson
>>
>>
>
>
> --
> Don't lose heart!  They might want to cut it out, and they'll want to avoid
> a lengthily search.
>
>
>
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-- 
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