lens polishing

[Rob Tucher]

Sorry, but this sort of question comes up every now and then. I just went throu gh all of the old threads and couldn't find one on lens polishing and coating. I would swear that I read one not long ago about a guy who had a Voigtlander Apo Lanthar 150mm/4.5 polished and coated, and I have the same lens and it is despa rately in need. I got the e-mail of a guy in Colorado who does this and I e-mai led him and he answered me, but in switching to a new computer recently I lost i t all. Anyone know what I am talking about? He gave me his address, phone, etc . and I can't find anything or recall the city.

[Bob Salomon]

Polishing actually means that the old coating is ground off. This changes the specifications of the elements.

After polishing the lens will never perform as it did new.

[Donald Brewster]

I'm guessing you were correspoding with John van Stelten in Louisville, Colorado: focalpt@ecentral.com

[Tom Keenan]

I think you read this:I recently had my APO Lanthar 150 recoated and though it was only a single coating it solved the problem of severe cleaning marks sustained from the previous owner. I used John van Stelten and am very happy with his work. The cost was $225 + shipping. I am not sure if he does any multi coating. His address is:

Focal Point Inc. 1017 South Boulder Road Suite E-2 Louisville, Co. 80027 Phone 303-665-6640 Fax 303-665-3803 E-mail: focalpt@ecentral.com

-- Ray Fenio (rfenio@indiana.edu), March 16, 2000.

[Rob Tucher]

Thanks Tom. That is the one. I couldn't find it. And thanks Bob. I guess I remembered it wrong because polishing is not mentioned. I guess a recoating would do it. I have been told that 1/2 of 1% of the lenses that are recoated crack or shatter in the heat process. Pretty good odds I guess, but when you are the 1/2...?