Re: 4x5 Sheet Film

----- Original Message -----
From: "Doug Holt" <holt.design@verizon.net>
>
> Newbie question. I'm looking for recommendations for photo-paper and
sourcing
> for someone just getting into pinholing. I've built a camera (a gift)
that uses
> a 4x5 sheet holder, now I need something to put in the holder (I know
nothing
> about these matters). Critical specs on the camera are 83mm depth
(pinhole to
> sheet) and .38mm diameter pinhole. Ideally anything cheap, consistent,
and easy
> to self process is what I'm looking for.

Advice is coming in "installments", here is another installment :-)

- If you use B&W paper, you may want to consider it has an speed of ISO-6
- Your camera has an aperture of f/218 ( 83 / 0.38 = 218 ) which is just
about f/180 +0.5 stops, but for all intents and purposes of pinhole, you can
consider it to be f/256
- If shooting under sunny skies, a suggested exposure time in seconds would
be 256 divided by the speed of the photographic material you are using. For
example, if using B&W paper with a suggest speed of ISO-6, the suggested
exposure time would be 256 / 6 = 42 seconds. Another example, if you wee to
use Polaroid 55 (suggested in another reply) and you were to shoot for
prints (ISO-64), the exposure time under sunny skies could be 256 / 64 = 4
seconds
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Received on Thu Dec 15 18:24:10 2005