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Andy

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Posted on Sunday, July 04, 2004 - 12:23 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Moderator/Admin Only) Ban Poster IP (Moderator/Admin only)

hi, ive just recently bought a nikon F55 and loaned it to a friend to take on holiday un fortunatley the internal lens ( the lens with the 3 focusing squares on ) got very dusty, after trying many things i simply couldnt clean this! now due to lack of sleep i decided to use a screw driver and a slightly wet cloth (the idea was to use the screw driver to get into the corners) and then a dry cloth to polish, when i checked after i actually did this there were 2 long scratches on this internal lens.
after screaming and shouting at myself, i pondered if this could be repaired and straight the way consulted the internet, could anyone let me know if it can be repaired?
i know this doesnt effect the out come of the picture but it is something i would like to get fixed, but for now can live with.
thanks for your help
Andy
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Kar Yan Mak (Admin)

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Posted on Sunday, July 04, 2004 - 04:29 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Moderator/Admin Only) Ban Poster IP (Moderator/Admin only)

I am assuming the "lens with the 3 focusing squares" is the viewfinder screen. You can simply replace it. Believe it or not, a couple of years ago I did the same thing and scratched my Elan IIE's (EOS 50E) viewfinder screen. The scratch could be seen everytime I look into the viewfinder. So I went to my local repair and after I waited 2 weeks for the part to arrive to the repair shop from Canon, they replaced the screen and even helped me clean out the mirror for USD $27.

From that time on, I know better not to clean the viewfinder screen. If there's a spec or two of dust, use a blower only (NOT compressed air or any type of cloth/tissue).
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Winfried

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Posted on Monday, July 05, 2004 - 04:52 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Moderator/Admin Only) Ban Poster IP (Moderator/Admin only)

It is almost impossible to clean a modern focussing screen without scratching it - they are made from molded plastic, and the very fine surface structure gets damaged when applying any tool.

I had good results when giving them to my optician to clean them in an ultrasonic bath. The only DIY method I would recommend is to rinse (NOT wipe!!!) a focussing screen with a strong solution of dish washing lotion, and let it dry (with one edge pointing downwards).
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Anders

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Posted on Monday, July 05, 2004 - 08:43 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Moderator/Admin Only) Ban Poster IP (Moderator/Admin only)

I have use a rubber (without sand) to clean screens, and after that soap and water. But make sure the rubber is clean and absolutely free from sand.

Anders

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