Guillermo, Thank you for your incredibly rapid response. This is exactly what I needed.
Michael -- On Sat, 19 Apr 2003 11:00:11 Guillermo wrote: > >----- Original Message ----- >From: "p g" <crd...@lycos.com> > > >> Is there a simple formula, for the mathematically challenged, to calculate >the light's angle of projection relative to the plane of an orifice as >diagramed below? >> For the Lenox's Pinhole Competition, the camera is designed with multiple >adaptors to reposition the disc to other locations using 1/2" interior >diameter PVC fittings. >> I want to calculate how far below the 0.585 mm aperture the fitting can >extend without protruding into the image's projection. Using this hardware >the fittings will need to extend 10-12 mm below the disc. Will this work, or >do I need to change the design? > >P.G: > >Your pinhole, if it is mounted right at the center of the fitting and if the >fitting extend 12mm bellow the pinhole, will project an unobstructed cone of >light of about 90 degrees (93.246 to be more exact). Will it work or do you >need to change the design? It will as long as your camera is made with a >focal length not shorter than half the diagonal of the format you are using. >If you need shorter focal length than half the diagonal of the format, just >use a fitting with a larger I.D. > >For math challenged, the best is to make a scale diagram on paper. > >Forgot the formulas, tell me if you really need them. > >Guillermo > > > > > >_______________________________________________ >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/ > ____________________________________________________________ Get advanced SPAM filtering on Webmail or POP Mail ... Get Lycos Mail! http://login.mail.lycos.com/r/referral?aid=27005
