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Re: [OM] Re: Metal surfaces and polarizers

Subject: Re: [OM] Re: Metal surfaces and polarizers
From: "Tom Trottier" <TomATrottier@xxxxxxxx>
Date: Tue, 30 May 2000 12:43:08 -0400
Hi Frank,

Apparently brass and aluminum (aluminium for you GBers) have very low 
friction together. A match made in heaven!

But aren't ALL lens threads steel?

Tom

At 2000 May 30 - Tuesday 20:39, Frank Ernens <olympus@xxxxxxxxxxxxxxx> 
spoke about *Re: [OM] Re: Metal surfaces and pol...* saying

> John Lind wrote:
> 
> > (5)  Precision and quality of the filter ring to get the filter
> > optics perpendicular to the lens axis, keep it that way under
> > repeated use, and not cause excessive wear to the lens ring.  IMO
> > brass is best, aluminum runs second but can stick easily making
> > removal difficult, and forget about plastic.
> 
> I agree, but could a brass filter damage a lens with plastic threads?
> 
>     Q1: Does the current model 50 f/1.8 really have plastic
>     filter threads (shoddy), or is just the bezel plastic like
>  that on my 24 f/2.8?

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