OM1 versus OM2 viewfinders

Discussion in '35mm Cameras and Accessories' started by BetterSense, Oct 12, 2010.

  1. BetterSense

    BetterSense Member

    Messages:
    3,126
    Joined:
    Aug 16, 2008
    Location:
    North Caroli
    Shooter:
    35mm
    I just got an OM1n to supplement my beloved OM2n and I'm a bit disappointed at the viewfinder. On my OM2n, the Zuiko 50mm lenses perfectly match the viewfinder magnification to real-world dimensions so that looking through the camera is almost like looking through a rangefinder window in that the image in the viewfinder is life-size. The OM1n, however, has the same size magnification but the viewfinder suffers from a parallax error so that the image I see through the viewfinder is offset compared to the real world. I'm wondering if all OM1s are like this or if mine is somehow knocked out of whack. I'm really loving the OM1n because it works without batteries but the viewfinder is sort of bumming me out. The OM2n has the best SLR viewfinder I've ever personally seen.
     
  2. jmcd

    jmcd Member

    Messages:
    715
    Joined:
    Sep 10, 2002
    If the viewfinder of the OM1n is short of glorious, something is out of whack. If you get a different image on your film than you see in the viewfinder, perhaps the focus screen or mirror is out of adjustment. If this is the case I would also expect focus error.

    I recently had a camera shipped to me that had only the cardboard box for padding. That type of situation can surely mess up fine adjustments.
     
  3. mr rusty

    mr rusty Subscriber

    Messages:
    763
    Joined:
    Sep 7, 2009
    Location:
    lancashire,
    Shooter:
    Medium Format
    Hi I can tell you absolutely definitely something is wrong. I have OM1 and OM2 and the viewfinders are identical. Your OM1 needs a bit of adjustment.
     
  4. xxloverxx

    xxloverxx Member

    Messages:
    156
    Joined:
    Jul 10, 2009
    Location:
    Hong Kong/Pa
    Shooter:
    35mm RF
    If you're having parallax issues on an SLR, something's definitely wrong…
     
  5. Les Sarile

    Les Sarile Member

    Messages:
    1,367
    Joined:
    Aug 7, 2010
    Location:
    Santa Cruz, CA
    Shooter:
    35mm
    The OM1 & OM2 are identical in this respect as they have the same viewfinder coverage of 97% with a magnification of .92X at infinity with a 50mm lens while the OM3 & OM4 are the same with 97% coverage with a magnification of .84X at infinity with a 50mm lens.
     
  6. BetterSense

    BetterSense Member

    Messages:
    3,126
    Joined:
    Aug 16, 2008
    Location:
    North Caroli
    Shooter:
    35mm
    I haven't noticed any focus shift yet, but I suppose it could be the mirror. Maybe I will have a look at it.
     
  7. MattKing

    MattKing Subscriber

    Messages:
    17,187
    Joined:
    Apr 24, 2005
    Location:
    Delta, BC, Canada
    Shooter:
    Multi Format
    Is there a diopter correction lens installed on one of the cameras?
     
  8. John Hermanson

    John Hermanson Member

    Messages:
    306
    Joined:
    Sep 19, 2005
    Location:
    Huntington,
    Shooter:
    35mm
    OM-1 and OM-2 viewfinders are identical in mirror, focus screen, prism and eyepiece placement. Something is wrong with your camera. Possibly camera had been apart and they did not seat the prism properly. If you start changing things (like mirror angle) without actually knowing what's wrong, you could end up with a 1N that's really messed up. John
     
  9. Pumal

    Pumal Member

    Messages:
    580
    Joined:
    Mar 12, 2009
    Shooter:
    Multi Format
    + Diopter
     
  10. BetterSense

    BetterSense Member

    Messages:
    3,126
    Joined:
    Aug 16, 2008
    Location:
    North Caroli
    Shooter:
    35mm
    Well, if there's a diopter thing, I don't know how to get it off; it looks utterly normal to me. Is a +diopter a semi-permanent installation?

    I just checked again and at 12 feet, the OM1n puts the image about 4-5 inches high and 4-5 inches to the right of "the real world". Note that I'm not sure if there's an actual parallax error between the viewfinder and the film. I do know that if the focus is off, it's only off a very tiny bit because I shot a roll in this camera, including some macro shots, and they came out pretty good.