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  1. #51
    Bill Burk's Avatar
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    Quote Originally Posted by Chan Tran View Post
    Not really Bill. But OKay it's close enough.

    If we talking about ISO 125 film then the light level for EV15 is less than the 4096 Cd/m^2. The Sunny 16 light level should still be 3251 Cd/m^2.
    I think we should still talk of EV 14 2/3. Or one-third-stop less than what we first surmised. How many Cd/m^2 is that?

  2. #52

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    yes for ISO 100, EV 14 2/3. Meter calibrated with K=12.5. it's 3251 Cd/m^2.

    EV 15 it's 4096 like Steve said.

    For ISO 1, EV 0 the lumination is 12.5 Cd/m^2 if K=12.5. If K=14 then it's 14 Cd/m^2 for ISO 1, EV 0.

  3. #53

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    Unfortunately my Weston Master II is no longer working. But to answer my own question if I were to calibrate it so that the number 400 means 400 Cd/ft^2 then I would need to set the film speed setting to 80 for and ISO 100 film then it will agree with a modern meter like the my Minolta flashmeter VI.

  4. #54
    Steve Smith's Avatar
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    Same as mine but apparently different to Bill's.


    Steve.

  5. #55
    Bill Burk's Avatar
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    Quote Originally Posted by Chan Tran View Post
    Unfortunately my Weston Master II is no longer working. But to answer my own question if I were to calibrate it so that the number 400 means 400 Cd/ft^2 then I would need to set the film speed setting to 80 for and ISO 100 film then it will agree with a modern meter like the my Minolta flashmeter VI.
    Revisiting this thread... Realizing I just took my last chart and have been running with it...

    Mechanically, what does the dial indicate when you do that?
    For example: Emulsion Speed 80, Pointer 1/3 stop below 400 Cd/ft^2, f/16 is opposite what shutter speed?

    For me, what I'd call the US Master Version (to contrast it with the UK Master Version) it is opposite 1/130

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