Re: pinhole photography/ calculating focal length

Adam (
7 Jul 1997 17:24:42 GMT

"Geoffrey V. Brown" <> writes: > Well, I've got some extra film and want to mess around with some stuff
> this weekend.
> I'm thinking about trying some pinhole photos, but doing them with my
> canon T-90 with the lens removed and a plate in its place. I'm
> wondering how if anyone has any suggestions on how to calculate the
> focal length.

I do this often with a Pentax Spotmatic with a body cap with a pinhole in it.
It is about equal to a 45mm lens, and I would guess that it will be about
the same on a T-90.