Through the lens metering

[john.l.barford]

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.

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[Barry Kirsten]

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.

[Dan Fromm]

Tell us about the camera and lenses too.

[Jac@stafford.net]

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

[ic-racer]

I'd be interested in your calibration technique.

[Jac@stafford.net]

So how do we measure 'nits'?

[Dan Fromm]

I'd be interested in your calibration technique.

That's nice, also completely irrelevant.

[ic-racer]

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?

[john.l.barford]

I am having diffulculty downlooading pictures

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[john.l.barford]

Makerbeam camera

I am having diffulculty downlooading pictures

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