Switch to English Language Passer en langue française Omschakelen naar Nederlandse Taal Wechseln Sie zu deutschen Sprache Passa alla lingua italiana
Members: 75,175   Posts: 1,658,630   Online: 1052
      
Page 1 of 6 123456 LastLast
Results 1 to 10 of 52
  1. #1
    paulbarden's Avatar
    Join Date
    Nov 2014
    Location
    Oregon, Willamette Valley
    Shooter
    Medium Format
    Posts
    296
    Images
    52

    Gossen Luna Pro: readings way off

    I recently bought a Gossen Luna Pro from an acquaintance for $20, and yesterday I installed the Gossen silver oxide battery adapter to correct for the voltage difference. In comparing the Gossen's readings to my Nikons built in meter and my iPhone metering app, the Gossen consistently reads nearly four full stops under the other meters. (Would result in gross overexposure)
    Is this meter worth repairing - is it even possible? What would you suggest?

    Paul

  2. #2
    MattKing's Avatar
    Join Date
    Apr 2005
    Location
    Delta, British Columbia, Canada
    Shooter
    Multi Format
    Posts
    13,836
    Images
    63
    George Milton at Quality Light Metric: http://www.yelp.ca/biz/quality-light...c-co-hollywood

    I exchanged emails with him in 2012, but get the impression that email is not the best way to correspond.
    Matt

    “Photography is a complex and fluid medium, and its many factors are not applied in simple sequence. Rather, the process may be likened to the art of the juggler in keeping many balls in the air at one time!”

    Ansel Adams, from the introduction to The Negative - The New Ansel Adams Photography Series / Book 2

  3. #3

    Join Date
    Oct 2012
    Location
    NE Ohio
    Shooter
    35mm
    Posts
    722
    You can adjust the Luna Pro w/the little screw on the back.

  4. #4
    paulbarden's Avatar
    Join Date
    Nov 2014
    Location
    Oregon, Willamette Valley
    Shooter
    Medium Format
    Posts
    296
    Images
    52
    Quote Originally Posted by chip j View Post
    You can adjust the Luna Pro w/the little screw on the back.
    That screw is only for zeroing the Battery Test function, not for making calibration adjustments, or so the manual states.

  5. #5

    Join Date
    Sep 2011
    Location
    Adirondacks
    Shooter
    Multi Format
    Posts
    3,879
    Quote Originally Posted by chip j View Post
    You can adjust the Luna Pro w/the little screw on the back.
    No you can not. That screw is for zeroing the needle, you remove the battery, press the rocker, and adjust the screw so the needle rests at the zero index, this is explained in the instructions.

    There are four calibration potentiometers, two for each range, also IIRC a battery check adjustment - and they are not user-accessible for very good reason.

  6. #6

    Join Date
    Sep 2011
    Location
    Adirondacks
    Shooter
    Multi Format
    Posts
    3,879
    Quote Originally Posted by paulbarden View Post
    That screw is only for zeroing the Battery Test function, not for making calibration adjustments, or so the manual states.
    See my post above and reread the manual.

  7. #7
    paulbarden's Avatar
    Join Date
    Nov 2014
    Location
    Oregon, Willamette Valley
    Shooter
    Medium Format
    Posts
    296
    Images
    52
    OK, so - is this worth pursuing or do I just give up on it and buy something modern?

  8. #8

    Join Date
    Dec 2006
    Shooter
    Medium Format
    Posts
    1,066
    Images
    108
    Quote Originally Posted by paulbarden View Post
    OK, so - is this worth pursuing or do I just give up on it and buy something modern?
    A Luna Pro F is basically the same meter with additional flash meter, and works with a standard 9V battery. They're not hard to find under $100.
    "People get bumped off." -- Weegee

  9. #9
    MattKing's Avatar
    Join Date
    Apr 2005
    Location
    Delta, British Columbia, Canada
    Shooter
    Multi Format
    Posts
    13,836
    Images
    63
    Quote Originally Posted by paulbarden View Post
    OK, so - is this worth pursuing or do I just give up on it and buy something modern?
    What type of batteries have you put into the battery adapter, and how new are they?
    Matt

    “Photography is a complex and fluid medium, and its many factors are not applied in simple sequence. Rather, the process may be likened to the art of the juggler in keeping many balls in the air at one time!”

    Ansel Adams, from the introduction to The Negative - The New Ansel Adams Photography Series / Book 2

  10. #10
    paulbarden's Avatar
    Join Date
    Nov 2014
    Location
    Oregon, Willamette Valley
    Shooter
    Medium Format
    Posts
    296
    Images
    52
    Quote Originally Posted by MattKing View Post
    What type of batteries have you put into the battery adapter, and how new are they?
    I bought the Gossen conversion kit which includes two Silver oxide batteries - presumably appropriate for this application since Gossen markets it as a kit. I have no idea how "new" the batteries are, but I got the kit yesterday and installed it immediately. New enough, I would imagine. The Battery Test indicator lands right smack in the middle of the red swatch, so.....

Page 1 of 6 123456 LastLast


 

APUG PARTNERS EQUALLY FUNDING OUR COMMUNITY:



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