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  1. #1
    Jon Shiu's Avatar
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    Fs: 2 Brass Pinhole Apertures $10

    These are two nicely made pinholes. I measured them and as near as I can tell, one is .38mm and the other .40mm. I looked online and the ideal focal length for the .38mm is 72mm and for the .40mm is 81mm. I see that the metal is not completely flat, but assume it can be flattened.

    $10 for the pair plus 2.00 for US postage, $5 for overseas.

    Jon
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  2. #2
    Nicholas Lindan's Avatar
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    I would guess the slight bow to the brass is so it will spring when pushed into a holder slot.
    DARKROOM AUTOMATION
    f-Stop Timers - Enlarging Meters
    http://www.darkroomautomation.com/da-main.htm

  3. #3
    Jon Shiu's Avatar
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    price drop to $6 for both, incl. shipping!
    Mendocino Coast Black and White Photography: www.jonshiu.com

  4. #4
    ambaker's Avatar
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    Fs: 2 Brass Pinhole Apertures $10

    PM sent...

  5. #5
    Jon Shiu's Avatar
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    sold.

    I believe these are somewhere around 100 years old.
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