Thanks Phil! It's clearly the first scenario -- the corners are perfectly clean and black. I suppose I will need to modify the camera some more to get rid of that slight edge that sticks up.
Much appreciated, R.J. -----Original Message----- From: Philip willarney [mailto:pwillar...@yahoo.com] Sent: Tuesday, November 12, 2002 3:00 PM To: pinhole-discussion@p at ??????? Subject: Re: [pinhole-discussion] Question on image circle and medium format pinhole camera design --- "Fox, Robert" <r...@aarp.org> wrote: ..snip.. > Question: my images are all circular, cutting off > the corners cleanly of > the square print. Is this because the image circle > is too small for the > film? I'm wondering if the circular edge of the > front plate is being picked > up on film, since the edge sticks up about 1/4 inch. If the edges of the photos are sharp, hard edges, it's probably vignetting -- something in the light path from the outside world to the film is blocking the light. So you're getting a nice clean photo of the edges of the lens holder, for instance. If the edge is a slow fade from picture to dim picture to black, then it's falloff. Pinholes as such don't have an image coverage circle -- the edges just get dimmer and dimmer as they get farther from the pinhole and get less & less light. I think. Any quibbles, anyone? -- pwillar...@yahoo.com __________________________________________________ Do you Yahoo!? U2 on LAUNCH - Exclusive greatest hits videos http://launch.yahoo.com/u2 _______________________________________________ Post to the list as PLAIN TEXT only - no HTML Pinhole-Discussion mailing list Pinhole-Discussion@p at ??????? unsubscribe or change your account at http://www.???????/discussion/
