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[OM] Re: element repairs and stuff relating to the 8mm fisheye although

Subject: [OM] Re: element repairs and stuff relating to the 8mm fisheye although also relevant to other lenses
From: Moose <olymoose@xxxxxxxxxxxxxxx>
Date: Tue, 08 Nov 2005 02:16:58 -0800
swisspace wrote:

>I think maybe I should have stopped working on the rear element group 
>about half an hour before I did. I had manged to get it looking quite 
>clear and the fungus which was between the layers had I thought receded, 
>but my wife reported that she could still see it, so I thought maybe a 
>little longer in the acetone would do the trick, unfortunately it seems 
>to have penetrated more into the glue between the layers so optically I 
>am back to where I was when I started.
>
>
>The second element the single one, I managed to improve with some very 
>gentle rubbing with some hand creme (not ponds though). But you can 
>still see the remnants of the fungus on the lens which to my wifes eye 
>appears as watermarks.
>
>I am aware that this is a rare lens, however its real worth is now 
>debatable when compared against the two hundred dollar 8mm pelang  and 
>now the new 8mm digital zuiko.
>
>The options now though are to repair the lens,
>
>1.   I could try contacting focal point (or can this be done by a list 
>member e.g John) and just ship them the rear elements  to see if they 
>can repair them but it would be quicker if I could find a company in 
>switzerland or germany or even UK. Should I maybe ask at one of the 
>opticians here.
>
>2.  I could leave the rear group to soak overnight  in acetone which I 
>am fairly confident will separate them  - then get hold of some new 
>cement and try recementing, Is the rotation as well as alignment 
>important. 
>
No, the lens elements are symetrical around their axes.

>For the other element I could buy some ponds cream and try 
>again rubbing a little bit then cleaning it off, then a bit more etc so 
>I gently polish the surface, hopefully removing the marks.
>  
>
You are probably overdoing it. Stop showing it to your wife.

>3.  I just leave it and put it all back together and use it.
>
>another thought but now I have the lenses in reasonable condition, 
>assuming they are separated could they not be measured by an optician or 
>their lab and then new ones made with equivalent strength and refractive 
>index etc, I am assuming technology has  given us some benefit ;-) and 
>if one set can be made then two or more could be made to help the others 
>on the list - OR am I just looking at things far to simply.
>  
>
Nice idea! Your local optician won't be able to do it and the price will 
be high.

Moose


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