What is the best way to clean a mirror?

Discussion in 'Medium Format Cameras and Accessories' started by KPT, Sep 10, 2008.

  1. KPT

    KPT Member

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    I have a Mamiya C330f that has a crudy mirror and was wondering what would be the best way to clean it. Should i go through the top or through the front? What product should i use? Thanks!
     
  2. Claire Senft

    Claire Senft Member

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    I am unfamilar with the mirror in a c330. I would guess though that it is a front surface mirrot and very easy to mar. At the most I would try a little bit of detergent in a lot of water and gently apply with a q-tip.
     
  3. elekm

    elekm Member

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    It depends what is on it. If the reflective surface is in otherwise good condition, you can try a little bit of water with a small amount of dishwashing fluid. Follow up by cleaning the surface with some optical cleaner.

    There is undue and unnecessary concern with scratching mirrors. As long as the reflective coating hasn't been damaged, you don't have to worry too much about cleaning. If the coating is in poor condition and flakes off when touched with a wet swab (try this on a corner), then that's something very different, and eventually you will want to replace that mirror.

    Remember, the mirror has no role in forming the final image. It simply reflects the scene on to the viewing screen. That's all. Minor scratches (or even a deep scratch) will have little -- if any -- discernible effect on the viewing image.
     
  4. DaveOttawa

    DaveOttawa Member

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    The same way hedgehogs make love - carefully:wink:
    Seriously, I would first try and blow or brush off any loose dirt then wipe any remaining contamination off using a soft swab (ideally something like a sensor cleaning swab not a q-tip) and lens cleaning fluid (use the smallest amount possible to do the job to reduce the chances of staining). As others have said since the viewing image isn't focused at the mirror plane minor coating contamination and damage will not be visible on the ground glass except as a loss of brightness. Any dust you can see will probably be located on the ground glass so you may have to clean that as well.
    The mirror coating is very thin and on the front surface so that is why care is needed to avoid scratching or removing it.
    As to access I'm not familiar with the mechanics on the C330 so whatever works.
     
  5. KPT

    KPT Member

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    Thank to you everyone for your replies. I would prefer to clean it through the top so i can also clean the ground glass, can i clean the ground glass also? and is there anything special i should do for that? I once heard that the ground glass might be shimmed so should i be worried about removing and cleaning it? Thank you again for all your help.
     
  6. benjiboy

    benjiboy Subscriber

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    If you loosen the screw at the back of the waist level finder, the hood just lifts off, then the focusing screen can be removed by pulling out the little metal tab at the back of the metal frame the screen is in, and lifting the back of it and sliding it towards you. The in the screens C330f are designed to be user interchangeable.
     
  7. KPT

    KPT Member

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    Thank you for your reply, i removed the glass already and cleaned it and the mirror. I have a clean and bright image now. Thanks!
     
  8. benjiboy

    benjiboy Subscriber

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    Pleased I could help.
    Best wishes, B