Question about Pentax ME Super 35mm SLR Camera

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Pentax ME super dirty mirror

What's the best way to clean a greasy smudge off the mirror?


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Check out the camera repair site at Cleaning a mirror safely is covered there. Essentially it is a cotton bud & alcohol thing, but there is a right way and a wrong way to do this.

Posted on Jan 21, 2009

  • Gordon Stalker
    Gordon Stalker Jan 23, 2009

    Alcohol is specified for these cameras in the official Pentax service manual.

    The viscous fluid method is called collodion cleaning. It works by gluing the dirt to a layer of nitrocellulose. (Collodion is a solution of nitrocellulose.) It is not perfect, it has it's risks especailly if the mirror has been marked in some way. This will provide a 'key' for the collodion, which could result in the peeling of the metal coating. It should only therefore be used when it is certian that this cannot occur. For most cameras this means you don't do it.

    It will be done for proffessinal cameras which have been maintained by the tecnician, or for mirrors in the optical path where absolute cleaness is of vital important. It is also quicker than other methods and is the reason that it is done in these situations.

    For most cameras this level of cleaness is not required, and even quite substantial marks are invisible or at least unubtrusive in practice. So in these cases the additional risk, and lower standard required maked it inapropriate.


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Don't even think about cleaning the mirror in your SLR. For smudges and marks that can't be blown away with a handheld blower, you really need to have it cleaned by a repair shop. Most technicians clean mirrors with a special viscous fluid specially formulated to protect the fragile surface of the mirrors. Definitely do not attempt it with a standard lens cleaning solution or cloth as you could cause irreparable damage.

Keep in mind that this will not require disassembly of the camera, so the charge should be nominal

Posted on Nov 29, 2008


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Posted on Jan 02, 2017

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Window Scuff Marks And Grease Stains Are Making Me Crazy! How Do I Deal With The Cleaning?

Hey pal, Scott here.

I have just the right solution for the scuff marks. Scratches are particularly hard to deal with especially when it comes to the delicate surface of a glass or mirror. Even the little uneven scuffs are clearly visible on glossy surfaces. But guess what, there's a simple trick to remove them for good.

You'll need some smooth peanut butter ( yes, you read that right ), car window cleaner, a couple of clean paper towels and you're ready to go. Simply smear a hefty dose of the peanut butter on the scuff mark, then wipe away with the paper towels and spray with the car cleaner. You'll be amazed how well this works.

Regarding the greasy smears, here are a couple of suggestions you might try.
  1. First off, try rubbing in some corn starch on the grease and then wipe away with a clean cloth and some cold water.
  2. The other suggestion that I overheard from a couple of window cleaners from Sydney is to use fabric softener sheets to wipe away the grease. Haven't really tried that one, but my wife says it works like a charm.
  3. Last but not least, if anything else fails you, gently rub some baking soda with a bit of water on the greasy windows and leave the substance deal with the grease for an hour or so.

Wish you luck and let me know which has worked best for you.

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