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Re: [OM] Prism replacement (was NGM Advertisement)

Subject: Re: [OM] Prism replacement (was NGM Advertisement)
From: HI100@xxxxxxx
Date: Wed, 7 Mar 2001 23:38:30 EST
wayneharridge@xxxxxxxxxxxxxxx writes:

<< Anyone know how much it would cost to have an old prism
 re-silvered/re-aluminised ?  I'm guessing it might be less than $400. 
>>

My father-in-law does genuine silver "silvering" and I am fairly sure he 
would be glad to do it for less than $400 but.... You would have to clean off 
the glass first and get it really clean and you would have to mask off the 
areas with tape or wax or someting where you did not want silver, quite a bit 
of work. Doing silvering over only a portion without cleaning would probably 
leave edge marks. 

Since you can buy a dead OM10 for about $20-30 and pull off the prism, it is 
just not worth it.  John Hermanson mentioned previously that the OM10 has the 
same prism as on the OM1. He also mentioned that it is not trivial to do the 
prism alignment which uses shims and really requires a collimator to do 
properly. So your best bet would be to get an old OM10, strip the prism and 
send it with the OM1 to a qualified tech to install, still probably a lot 
less than $400!

Alternately just remove the rotting foam to stop further damage and clean off 
the blackened section well. The prism should work with no silvering , but not 
as efficiently, so you get a darker section but still better than foam rot 
blackened silver debris. 

                  Regards,
                 Tim Hughes
                >>Hi100@xxxxxxx<<

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