[rollei_list] Re: OT: Repolish (question for Richard)
- From: Jerry Lehrer <jerryleh@xxxxxxxxxxx>
- To: rollei_list@xxxxxxxxxxxxx
- Date: Fri, 11 Nov 2005 08:42:13 -0800
No
john wrote:
> Does anyone have experience with polishing front elements with
> extensive, contrast-reducing extremely fine "cleaning marks"? Did the
> performance of the lens change? The $195 it costs to have Focal Point
> do polish/coat/recollimate is more than I can afford and out of
> proportion to the value of the lens. A thread on kyphoto recommends an
> outfit in Tasmania (Longman Optical) that will repolish a surface for
> $28, plus $14 to recoat. I have a LTM Jupiter-3 (Russian Sonnar 1.5/50
> clone). Might be worth trying.It looks easy enough to extract the
> front element; I can recollimate the lens myself (it's easy to get at
> and adjust the shims). Perhaps leave it uncoated. (I also have a
> collapsible LTM Summicron, but I don't feel competent to try to
> collimate it if necessary--dunno how to get at the shimming, if there
> is any...AFAIK Leitz matched the mount to the specific focal length of
> the sample, and there are no shims). Richard, do you know what kind of
> glass is used for the Sonnar front element...is it "hard" and could be
> expected to stay unscratched after polishing with normal care?
> (Probably so, the prewar Sonnars were happily uncoated). If it were
> you, would you consider having this procedure done? John
> Wiltonwww.ragarecords.com/photo
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