Hi I do not have a RAW output on my FZ10 camera so I always go by the end JPG pixel count as the relevant ratio. In this case 2304 x 1728 (at the resolution I use). I usually set up receiving analytic rectangles at those dimensions then visually scale them to fit my project ... you can see why I was running into massive project sizes of kilometres ... but it always worked Ok.
Image attached ... the light modelling was from a very convenient concrete water trough lower left. I didnt bother with any shadow cast from the right hand windgen since it was right on a ridge and fence shadows suggested nothing should show. I used blue-screen and the whole image printed quite well at roughly 400 x 300mm. Perspective calculations were based on the power pylons diminishing sizes. I got the FZ10 because of its massive 12x optical zoom ... a Leica lens design. 35mm equivalent of about 35 to 400mm focal length range. Neil Cooke ----- Original Message ----- From: "Frank Bueters" <[EMAIL PROTECTED]> To: <[email protected]> Sent: Thursday, April 06, 2006 3:34 AM Subject: RE: about exif data and matching > I have simply assumed that the ccd aspect ratio will be more or less equal > to 35 mm film, which is 2:3. 2:3 is the aspect ratio I use for film width > and height in rs3d. It gives a perspective that matches the photos pretty > well, allthough I have not tested it as thoroughly as you did, could be > interesting :) > > > So my question is: > > Is this film width and height value a constant factor for my > > camera? > > To the best of my knowledge, yes. > > > So when I use this setting can I trust that I can > > safely fill out the stored focal length data in RS to get a > > perfect camera object. > > Yes. > > After I read Cris's mail on the subject I looked up the aspect ratio for the > ccd in my camera. Guess what, 2:3!! > > Frank Bueters >
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