Re: New Project, Need Help!

[graywolf]

The focal-length of a pinhole is equal to the distance from the film plane. The 
f-stop is equal to the focal-length divided by the diameter of the pinhole. If 
the hole is too big, the image is too defused to use. Too small and you do not 
get enough light. There is an optimum size for a given focal-length, but I do 
not remember what that is, and don't care enough to look it up. However, I would 
be very surprised if there are not several pinhole photography sites brought up 
with a google search. Freestyle photo, BTW, has at least 3 different pinhole 
cameras listed in their catalog.

--
Don Sanderson wrote:
Blast you sir! Now you've gone and done it!
You went and made me actually start thinking. <ouch>
I was just practicing to be stand-by comic relief for the next time Frank
gets miffed at us. ;-)
OK. I'll bite, how *does* one decide how far from the film plane the pinhole
in a pinhole camera should be?
Does it just depend on the size of the image you want, or, (Caution, worlds
dumbest question follows)
is there actually some kind of "focal length" to a pinhole?
I'm trying to picture light rays thru a small hole.
I would assume the size of the pinhole itself is what determines COC size,
and that no actual FL exists.
OK, have at me.

--
graywolf
http://graywolfphoto.com/graywolf.html