minolta srt 101: mirror return ko at lower speed?

Discussion in 'Minolta' started by q29, Mar 14, 2005.

  1. q29

    q29 Guest

    Hi all,
    I noticed that the mirror of my SRT-101 works like that:
    - when a fast time is set( > 1/8s) the mirror returns ok
    - when a slow time is set( <= 1/8s) the mirror doesn't return, but it
    still remains locked up. When I load the film to be ready for the next
    shot, it returns ok.
    I looked the shutter and it's ok.
    Have you ever had some similar experience?
    So, is it all ok? Is it the first step of a more dangerous problem and
    should it be fixed if possible?
    Thank you in advance,
    q29, Mar 14, 2005
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  2. The mirror flips up against a row of foam. Is the foam perhaps getting
    James Robinson, Mar 14, 2005
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  3. q29

    q29 Guest

    I will check it... but in which way it depend by slow time set?
    Bye and tahnk you,
    q29, Mar 14, 2005
  4. q29

    columbotrek Guest

    On my SRT 101 if the mirror lockup conrtol dial is not resting home in
    its detent in the off position, (not locked up) the mirror may not
    return down after an exposure. Don't know if this is it but you may
    want to check.
    columbotrek, Mar 14, 2005
  5. q29

    ColynG© Guest

    Mirror foam is deteriating and turned sticky.
    ColynG©, Mar 14, 2005
  6. It's only a guess at the problem, since older cameras often have issues
    with deteriorating foam. Longer exposures mean that the mirror will
    rest on the foam longer, and might allow the mirror to stick. It
    doesn't answer all of your symptoms, but it is easy to check, and a
    common problem.
    James Robinson, Mar 15, 2005
  7. I acquired an old Praktica today that seems to be having the same
    problem. Mirror consistently sticks up on exposures longer than 1/32.

    However, the shutter also lags on speeds slower than that so I wonder
    if the two are connected? Or if they are different problems?

    Matthew McGrattan, Mar 15, 2005
  8. q29

    q29 Guest

    Of course, :)
    I checked the foam and it seems to be ok.

    It should be a right hypothesis... but in B pose, that means the
    longest time for mirror to stick, it works ok...

    Thank for your help,
    q29, Mar 15, 2005
  9. q29

    q29 Guest

    I checked the foam but it seems to be ok.
    Thank for your help,
    q29, Mar 15, 2005
  10. q29

    ColynG© Guest

    If the foam is ok then you have dry lube causing the mirror kick gear
    to stick at slow speeds.
    You will need to have a CLA done on the camera..
    ColynG©, Mar 15, 2005
  11. I seem to be having a similar problem with a new camera.

    If I open the back of the camera (a Praktica Super TL with rubberised
    cloth shutters) and take the plate off that covers the shutter
    curtains I can 'kick' the mirror down by simply nudging, a fraction of
    a millimetre, the small cog at the base of the roller the 2nd shutter
    curtain is on.

    It drops fine at all speeds from 1/32 to 1/500 and also on B. It works
    intermittently on 1/15 but always sticks on 1/8, 1/4 and 1/2.

    Now I can't afford to pay for a CLA on a camera that cost me the
    equivalent of $5.

    Is it possible to adjust something - to increase shutter tension or
    similar? - to make it drop? or is it these cogs at the base of the
    roller that need a gentle clean with a little isopropyl alcohol?

    Any tips gratefully received.

    [It seems a shame to junk the camera since it works fine in all other

    Matt McGrattan, Mar 15, 2005
  12. q29

    ColynG© Guest

    The only safe way to get your camera back in good working order is a
    CLA. Just cleaning the gear won't fix it and adjusting the shutter
    tension will affect the shutter speed accuracy...
    ColynG©, Mar 16, 2005
  13. q29

    q29 Guest

    Sorry... but what is CLA?
    Thank yoo,
    q29, Mar 16, 2005
  14. Clean, Lube, & Adjust.
    William Graham, Mar 16, 2005
  15. q29

    ColynG© Guest

    Clean, lube, and adjust.
    ColynG©, Mar 16, 2005
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