Thomas Harvey wrote: > > I have just uploaded a couple of images to my server. Both were > taken with an old Ansco 6x9 folding camera. I ripped the folding > front door and bellows out, put a plate and pinhole across the front. > I think the focal length is about 19mm. > > Tom > > http://web.pdx.edu/~harveyt/USsundialPin.jpg > > http://web.pdx.edu/~harveyt/PolesPin.jpg >
Upon checking, I misspoke on the focal length of my 6x9 camera. It is 29mm (not 19mm). I used an .0087" pinhole, one in a package of pinholes I bought from Pinhole Resource. It's "ideal" focal length is 35mm, and was the closet to 29mm "ideal" of the bunch.
Tom
