[photo-3d] Re; round format-Was MF camera

[Alan Lewis <3-d@xxxxxxxx>]

Previous message:
> The original Kodak Brownie took a circular picture! I think it was 2.5" in
> diameter. It's a great idea Alan, it would also make the most of the field
> of the taking lenses; no vignetting. ...but of course, it would waste film.
 
Michael Galazin added:
> My comments:
> I'd prefer looking thru the stereo window any day over looking thru a stereo
> porthole!  :)
> 
> I'm not sure we would want to "make the most of the field of the taking
> lenses" since the outer perimeter is the softest part of the lens; on wide
> apertures you'd get a lot poorer quality around the entire periphery, I'd
> think, rather than especially at the corners as we probably get now.  And
> since the film is only so high, one cannot make the circular format give us
> more view at top and bottom.  Instead of gaining view at the top, bottom,
> and sides, we would be *losing* view at the corners.
> 
> I suspect I've "cornered" you with that last point.  :)
> 

If a circular format was being consider I would use a wide angle lens on
the camera (60mm rather than 80mm perhaps) then use a shorter f.l.
viewer lens (60mm rather than 80mm) to get both a larger magnification
and more image so I don't lose any corner view.

Practically speaking this is the same as just using the same lens
combo's and stay with the square film format, the extra viewer
magnification will just mask out the corners of the image and produce a
full lens dia. image rather than a porthole window image.

I have no idea if I would like viewing this way, but I can try it
sometime and see how it works.  

Eventually I would probably end up with fisheye lens MF images and the
shortest f.l. viewer lens I could find and still have a sharp image.

Anybody have a really good fisheye MF image I could borrow?

-- 
Alan Lewis  
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