Clockwork Light Meter

Discussion in 'Miscellaneous Equipment' started by cliveh, Jan 18, 2013.

  1. cliveh

    cliveh Subscriber

    Messages:
    4,710
    Joined:
    Oct 9, 2010
    Shooter:
    35mm RF
    Is it possible to make a clockwork light meter? If so, would I be the only person who may use one?
     
  2. Peltigera

    Peltigera Member

    Messages:
    706
    Joined:
    Mar 11, 2012
    Location:
    Lincoln, UK
    Shooter:
    Multi Format
    What would the clockwork be doing? I really cannot imagine hopw you could have such a thing.
     
  3. jbrubaker

    jbrubaker Member

    Messages:
    43
    Joined:
    Jan 5, 2008
    Shooter:
    35mm
    What is a clockwork light meter?

     
  4. E. von Hoegh

    E. von Hoegh Member

    Messages:
    3,925
    Joined:
    Sep 14, 2011
    Location:
    Adirondacks
    Shooter:
    Multi Format
    Of course not.
     
  5. Matthew Wagg

    Matthew Wagg Member

    Messages:
    97
    Joined:
    Aug 25, 2011
    Location:
    Sandiacre, N
    Shooter:
    Multi Format
    How on Earth would such a thing work? The old meters used Selenium cells which turned light into an electrical signal which then registers on the meter. I don't see where winding it up would come into it.
     
  6. E. von Hoegh

    E. von Hoegh Member

    Messages:
    3,925
    Joined:
    Sep 14, 2011
    Location:
    Adirondacks
    Shooter:
    Multi Format
    You wind up the clockwork. The clockwork train turns a tiny regulated generator which supplies 2.7 volts to your LunaPro. That's about as close as you can come to a clockwork lightmeter.:smile:
     
  7. cliveh

    cliveh Subscriber

    Messages:
    4,710
    Joined:
    Oct 9, 2010
    Shooter:
    35mm RF
    We have wind up radios, as endorsed by Nelson Mandela, so why not a wind up light meter?
     
    Last edited by a moderator: Jan 18, 2013
  8. vpwphoto

    vpwphoto Member

    Messages:
    1,205
    Joined:
    Feb 21, 2011
    Location:
    Indiana
    Shooter:
    Multi Format
  9. Worker 11811

    Worker 11811 Member

    Messages:
    1,629
    Joined:
    Jan 29, 2010
    Location:
    Pennsylvania
    Shooter:
    Multi Format
    There could also be a gear train which, when you line a pointer up to the needle, turns the exposure calculator to show the setting.

    I imagine some kind of Steampunk-looking gizmo with lots of brass gears and stuff. Sort of like an Argus C3 on steroids.

    Maybe something like this:
    http://lh3.ggpht.com/abramsv/SAbnnw2ppxI/AAAAAAAAOog/A3AIV4qGNs8/s1600-h/steampunk6.jpg
     
  10. cliveh

    cliveh Subscriber

    Messages:
    4,710
    Joined:
    Oct 9, 2010
    Shooter:
    35mm RF
    That sounds like what I'm looking for.
     
  11. Worker 11811

    Worker 11811 Member

    Messages:
    1,629
    Joined:
    Jan 29, 2010
    Location:
    Pennsylvania
    Shooter:
    Multi Format
  12. Chan Tran

    Chan Tran Member

    Messages:
    2,373
    Joined:
    May 10, 2006
    Location:
    Aurora, IL
    Shooter:
    35mm
    Oh so it's a wind up meter. Doesn't need clock work with escapement.
     
  13. BMbikerider

    BMbikerider Member

    Messages:
    825
    Joined:
    Jul 24, 2012
    Location:
    County Durha
    Shooter:
    35mm
    I think this post is a 'wind-up':whistling:
     
  14. markbarendt

    markbarendt Subscriber

    Messages:
    7,516
    Joined:
    May 18, 2008
    Location:
    Beaverton, OR
    Shooter:
    Multi Format
  15. cliveh

    cliveh Subscriber

    Messages:
    4,710
    Joined:
    Oct 9, 2010
    Shooter:
    35mm RF
  16. E. von Hoegh

    E. von Hoegh Member

    Messages:
    3,925
    Joined:
    Sep 14, 2011
    Location:
    Adirondacks
    Shooter:
    Multi Format
    As I pointed out above, clockwork cannot by it's nature measure light. The wind up radios use the machanism I described above, or have no clockwork and the user turns the generator directly by a small crank. The actual radio is no different from any other radio deriving it's power from a chemical battery, photovoltaic battery, or mains voltage.
     
  17. markbarendt

    markbarendt Subscriber

    Messages:
    7,516
    Joined:
    May 18, 2008
    Location:
    Beaverton, OR
    Shooter:
    Multi Format
    Sure, got duck tape? :laugh: