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Thread: Through the lens metering

  1. #1

    Through the lens metering

    I have made a 4x5 camera using aluminium extrusions called makerbeam. I have bought one 150mm 4x5 lens and have made a couple more using binocular objective lenses and old prontor shutters from vintage bellows cameras. I decided to build a through the lens meter to more easily calculate the exposure reqiired for these home made lenses and also to more fully understand the effects of filters and bellows extension and just for the hell of it.
    After huge amount of trial and even more error i have succeeded in making a resonably accurate meter which fulfills the above criteria.
    I will publish details of the build if anyone is interested.
    Let me know.

    Sent from my SM-T210 using Tapatalk

  2. #2

    Join Date
    Oct 2010
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    Brookfield, Vic., Aust.
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    Re: Through the lens metering

    Very interested, John. There's a lot of diy-ers here, and I'm sure there would be a lot of interest. Thanks in advance.

  3. #3

    Join Date
    Dec 2001
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    NJ
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    Re: Through the lens metering

    Tell us about the camera and lenses too.

  4. #4
    Jac@stafford.net's Avatar
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    Dec 2012
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    Winona, Minnesota
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    Re: Through the lens metering

    Post more! I am another DIY fan, and I haven't looked at makerbeam for some time.
    And welcome!

  5. #5
    ic-racer's Avatar
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    Feb 2007
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    Re: Through the lens metering

    I'd be interested in your calibration technique.
    Click image for larger version. 

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  6. #6
    Jac@stafford.net's Avatar
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    Re: Through the lens metering

    So how do we measure 'nits'?

  7. #7

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    Re: Through the lens metering

    Quote Originally Posted by ic-racer View Post
    I'd be interested in your calibration technique.
    Click image for larger version. 

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    That's nice, also completely irrelevant.

  8. #8
    ic-racer's Avatar
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    Feb 2007
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    Re: Through the lens metering

    Quote Originally Posted by Dan Fromm View Post
    That's nice, also completely irrelevant.
    Since you responded, what is your "relevant" technique? Something that falls outside of empiric physics like most of your posts?

  9. #9

    Re: Through the lens metering

    I am having diffulculty downlooading pictures

    Sent from my SM-T210 using Tapatalk

  10. #10

    Re: Through the lens metering

    Makerbeam camera
    Quote Originally Posted by john.l.barford View Post
    I am having diffulculty downlooading pictures

    Sent from my SM-T210 using Tapatalk


    Sent from my SM-T210 using Tapatalk

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