Switch to English Language Passer en langue française Omschakelen naar Nederlandse Taal Wechseln Sie zu deutschen Sprache Passa alla lingua italiana
Members: 70,561   Posts: 1,545,292   Online: 775
      
Page 1 of 2 12 LastLast
Results 1 to 10 of 14
  1. #1

    Join Date
    Dec 2012
    Location
    Southern Indiana
    Shooter
    35mm
    Posts
    88
    Images
    2

    Yashicamat 124G Meter Adjustment

    Can anyone advise me about the functions of the 2 potentiometers on the Yashicamat 124G light meter? I suspect one is gain and the other offset, but I could be way off base.

    Mine reads too dark by about 4 stops. It appears that the switch works properly and I am using a hearing aid battery with adapter.

    Yes I have a good hand held meter, but would like to get the built in meter working at least in the ball park.

    Any help with adjustment would be appreciated.

  2. #2
    cjbecker's Avatar
    Join Date
    Dec 2010
    Location
    IN
    Shooter
    Medium Format
    Posts
    740
    Images
    19
    No but all I can say is the best light meter is your eyes and brain. Just go by your gut.


    All depending if you shoot chrome's though

  3. #3
    ic-racer's Avatar
    Join Date
    Feb 2007
    Location
    Midwest USA
    Shooter
    Multi Format
    Posts
    6,221
    Yes, the Yashica 124g service manual I have only is an assembly manual with no mention of meter calibration. Maybe the meter is covered in the 124 (non-G) service manual (which I have never seen).

  4. #4
    EASmithV's Avatar
    Join Date
    Aug 2008
    Location
    Maryland
    Shooter
    Multi Format
    Posts
    1,874
    Blog Entries
    4
    Images
    123
    what if you just adjust the ISO to match the correct setting?
    www.EASmithV.com

    "The camera is an instrument that teaches people how to see without a camera."— Dorothea Lange
    http://www.flickr.com/easmithv/
    RIP Kodachrome

  5. #5

    Join Date
    Mar 2012
    Location
    Germany
    Shooter
    Medium Format
    Posts
    125
    I did calibration on mine once, I decided to ditch the 1.35v baterries and went with 1.5v + recalibration.
    1 of the potentiometers seems to handle the minimum threshold for light sensitivity and the second one lets you fine-tune it. Cant remember which is which but can be easily figured out.
    Just choose a battery type, then meter an opaque wall(brick)? at, f3.5;1/30 -> and then going up +1stop changing fstop
    and then again from f3.5;1/30 -> f3.5;1/500. (always corroborating with a trust-able avg meter.
    My Yashica meters precisely like my spot meter, dslrs and slrs under normal circumstances (no backlight sun/snow/sand).
    "The Medium is the Message"

  6. #6
    C.poulton's Avatar
    Join Date
    Nov 2007
    Location
    London
    Shooter
    35mm RF
    Posts
    23

    Yashicamat 124G Meter Adjustment

    My 124G meter is about 2 stops out - not sure if its faulty, just the way the meter works (tends to expose more for the sky) or me, however I tend to use a hand held meter in most cases.

    As an aside I have a Pentax Spotmatic who's meter is 2 stops out - I've tried on numerous occasions to fix this, recalibration and even replacement of the meter cells, but to no avail - I just use an external meter now.....


    Christian

  7. #7

    Join Date
    Mar 2012
    Location
    Germany
    Shooter
    Medium Format
    Posts
    125
    If there is light from the sky try point to the ground in a small angle or cover the top and give it shade with the palm of your hand to avoid the sun from throwing it out.
    "The Medium is the Message"

  8. #8

    Join Date
    Dec 2012
    Location
    Southern Indiana
    Shooter
    35mm
    Posts
    88
    Images
    2

    Results of Adjustment

    I am pleased to report that I have successfully recalibrated my light meter. It does appear that the potentiometer on the right is a gain adjustment and the left one is offset.

    After about 2 hours of work, my built in meter is spot on with my Gossen Luna Pro F throughout the full range of illumination. My Luna Pro was just calibrated by Quality Light-Metric in Hollywood. I highly recommend them.

    So it can be done.

    Quote Originally Posted by dbuchheit View Post
    Can anyone advise me about the functions of the 2 potentiometers on the Yashicamat 124G light meter? I suspect one is gain and the other offset, but I could be way off base.

    Mine reads too dark by about 4 stops. It appears that the switch works properly and I am using a hearing aid battery with adapter.

    Yes I have a good hand held meter, but would like to get the built in meter working at least in the ball park.

    Any help with adjustment would be appreciated.

  9. #9

    Join Date
    Mar 2012
    Location
    Germany
    Shooter
    Medium Format
    Posts
    125
    GRATZ! I hate when people treat things/procedures/etc like alien given gifts that are not meant to be tinkered with. Its incredible what a bit of science can do to.
    "The Medium is the Message"

  10. #10
    DWThomas's Avatar
    Join Date
    Jun 2006
    Location
    SE Pennsylvania
    Shooter
    Multi Format
    Posts
    2,240
    Images
    65
    Thanks!

    I have filed these comments for when I some day get around to opening up my 124G. (So far I've been using a separate meter.)

Page 1 of 2 12 LastLast


 

APUG PARTNERS EQUALLY FUNDING OUR COMMUNITY:



Contact Us  |  Support Us!  |  Advertise  |  Site Terms  |  Archive  —   Search  |  Mobile Device Access  |  RSS  |  Facebook  |  Linkedin