----- Original Message ----- From: "Don Sanderson" Subject: RE: New Project, Need Help!
> 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. The focal length is the distance from the film plane to the pinhole. The size of the pinhole determines COC (in this case, the degree of unsharpness). Enter "pinhole photography" into Google. Ignore the inevitable porn listings. William Robb
