Re: help with indoor exposures needed

Hi Sarah,

Do you know the difference in f-stops between the outdoor and indoor
light? This can give a good starting point for indoor exposure. You
can usually figure this out with a hand-held light meter using the
exposure value (EV) scale.

As an example, I have a camera that takes 100 seconds for an exposure
in bright sunlight (EV 16). I've make several exposures inside office
buildings where the light was seven stops less (EV 9) than bright sun.
So, double the exposure for each stop. You can work this out in your
head like this: 2, 4, 8, 16, 32, 64, 128 times as long. 100 times 128
indicated an exposure of 12800 seconds. This worked out to be a
4-hour exposure (and this is where paper or a calculator came in
handy). It worked! This camera used large paper negs, but the same
technique works with film.

Naturally, the lighting conditions will have a big impact, whether
you're near a window, etc. I have not worked much with T-Max, but my
memory is that, at long exposures, it is way faster than other 100 ASA
films.

Hope this helps.

Tom

----- Original Message -----
From: "Sarah Heidt" <heidtsarah@hotmail.com>
To: <pinhole-discussion@pinhole.com>
Sent: Sunday, April 07, 2002 8:16 AM
Subject: [pinhole-discussion] help with indoor exposures needed

>
> I have been fairly happy with my results when taking pinhole
pictures
> outdoors but I am not sure how to figure out the exposure for indoor
shots.
> I know this is a really novice question, but sould someone help?
> The last picture I tried indoors came out totally overexposed. I
was using
> TMax 100 film and I exposed for 1 minute which I thought might not
be long
> enough, but it was too long.
>
> Sarah Heidt
>
>
>
>
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Received on Sun Apr 7 11:38:34 2002