Pentax MG - mirror locked up and wont wind on....

Discussion in 'Pentax' started by simon, Sep 17, 2005.

  1. simon

    simon Guest

    Can anyone help.

    I depressed the shutter button on my old pentax MG with no film in it.
    ir sounded like the shutter worked but the mirror is now flipped up (the
    screen is closed) and it won't wind on with the thumb lever.

    Advice welcome.
     
    simon, Sep 17, 2005
    #1
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  2. simon

    Paul Guest

    : Can anyone help.
    :
    : I depressed the shutter button on my old pentax MG with no film in it.
    : ir sounded like the shutter worked but the mirror is now flipped up (the
    : screen is closed) and it won't wind on with the thumb lever.
    :
    : Advice welcome.
    :
    Tried fresh batteries?
     
    Paul, Sep 17, 2005
    #2
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  3. simon

    simon Guest

    If i recall correctly the only battery is for the light meter. (a button
    cell)
     
    simon, Sep 17, 2005
    #3
  4. simon

    Paul Guest

    : If i recall correctly the only battery is for the light meter. (a button
    : cell)
    :
    If I recall correctly the MG is very similar to the ME (my first SLR), which
    has an electronically controlled shutter, i.e., batteries required (2 x A76
    or similar, IIRC). The ME has ONE mechanical shutter speed, 1/90th sec, that
    allows the camera to be used without batteries (although of course in that
    case the meter doesn't work). According to Boz Dimitrov's Pentax site, the
    MG also has one mechanical speed (1/100), plus B.

    If I were you, I'd put some fresh batteries in that baby and see if that
    helps.

    Paul
     
    Paul, Sep 18, 2005
    #4
  5. Looking at the manual I think if you set the shutter speed to 1/100
    (100x) or B you should be able to drop the mirror if the batteries are
    dead. Those are the only two speeds it allows manual shooting. Just a
    guess.

    If not:

    Does the MG have Mirror Lock-up capability? I don't think it does
    (looked at the manual) but worth investigating as well. I guess you are
    sure it is an MG. ;^)

    The manual is here BTW:
    http://www.pentax.com/docstore/index.cfm?show=6
     
    Christian Bonanno, Sep 18, 2005
    #5
  6. simon

    simon Guest

    yeah it is an MG.

    Have tried selecting 100X and B - did expect that to drop the mirror but it
    didn't.
    Will have to try changing the batt's

    SS
     
    simon, Sep 18, 2005
    #6
  7. simon

    Tony Polson Guest

    The problem is likely to be that the mirror bumper foam has degraded
    and become sticky. This happens to almost all SLR cameras after a
    period of between 10 and 25 years, depending on climate and use.

    When you press the shutter release, the mirror flips up to black out
    the viewfinder. It hits the mirror bumper, which is a foam strip that
    surrounds the base of the focusing screen, and comes to a halt. Then
    the shutter operates, and the mirror flips down again.

    What has probably happened is that the mirror has hit the degraded
    foam and stuck to it. You might be able to get the mirror to flip
    back down by gently persuading it with a fingernail to unstick from
    the foam. However, this is risky because the mirror and its mechanism
    are delicate and easily damaged.

    So here is a better idea: as the camera will need to have the foam
    replaced in any case, you should take it to an experienced repairer
    who will correct the mirror problem and replace not only the mirror
    bumper foam, but also the felt light traps in the film chamber, which
    deteriorate at about the same rate. If you need new foam, you will
    need new felt too.

    The cost of this will be between £45 and £70, depending on the
    repairer. The price will include cleaning and lubrication of the
    shutter and adjustment of the light meter, often referred to as a
    "clean, lubricate and adjust" or "CLA".

    Those prices might make it appear worthwhile to buy a good used
    example of one of the many Pentax 35mm SLRs rather than get yours
    repaired. However, most used cameras sold in the UK seem to need the
    mirror bumper foam and light trap felt replacing, so unless you are
    sure that it has already been done, beware buying used.
     
    Tony Polson, Sep 18, 2005
    #7
  8. simon

    Bhup Guest

    I recently bought a pentax super a and the mirror bumper is sticky the
    mirror sticks for a second or so .
    I plan to do the replacement my self what sort of foam do I need and where
    can I buy some from?
     
    Bhup, Sep 18, 2005
    #8
  9. simon

    Ken Guest

    I've seen the mirrors lock up from degraded mirror bumper foam as well.

    There is a guy named Interslice on eBay that sells a quality light seal kit that works with most cameras.
    I re-sealed a Pentax SuperA with one of his kits a couple of months ago and had no problems getting
    it to work. I've sealed probably 15 cameras in the past few months and his materials are good in my
    opinion. Offers free shipping and a fixed price.

    http://cgi.ebay.com/Complete-Light-...ryZ15241QQssPageNameZWDVWQQrdZ1QQcmdZViewItem

    If that link doesn't work try this - http://tinyurl.com/9a85m
     
    Ken, Sep 19, 2005
    #9
  10. simon

    Tony Polson Guest


    Hi Bhup,

    I have seen all sorts of suggestions as to what material could be
    used, including old mouse mat foam, but it is best to use the correct
    foam.

    try:
    http://www.micro-tools.com/
    and click on the link to "Micro-Tools Europe".

    Alternatively, try the following eBay seller:
    kameradoktor

    (Go to http://www.ebay.co.uk then choose "Advanced Search" and insert
    "kameradoktor" in the "From sellers" section. Click on any item, then
    choose "Ask seller a question" and ask for a price for a kit for the
    Pentax Super A. )

    You will need a sharp knife, a cutting mat, good eyes and a very
    steady hand. ;-)

    Good luck!

    Best regards,

    Tony
     
    Tony Polson, Sep 19, 2005
    #10
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