Re: Goofy project idea

[Greg Erker <erker@xxxxxxxxxxxxxx>]

>VERY interesting binoculars effect :-)  Thought
>I was the only one with that goofy idea.

  :)

>Perhaps try a focal-plane shutter camera like Pentax 645
>-- mount a Pentax 35mm extension tube inside a 645 extension
>tube, somehow.  SLR and no shutter worries.  I might try it :-)

  K-mount and M-42 (pentax screwmount) lenses
need to be 46.46mm from the film plane to achieve
infinity focus. Medium format bodies are usually
much thicker than this. So, unless you can lock
up the mirror and then mount your lens way inside
the body you are out of luck.

  This page shows the registration distance for
various SLRs and lens systems:
http://www.a1.nl/phomepag/markerink/mounts.htm

  This problem is why I'm thinking about hacking
up an old folder type camera (to get the lens
close to the film plane).


>BTW are you a machinist?  I have a ton of wacko ideas
>(stereo or panoramic) but no machinist experience or
>tools other than a Dremel...  I'd love to learn how
>to do this.
>
>Best,
>-- William (wchang@xxxxxxx  Berkeley, CA)

  Not a machinist, though my (always busy)
brother-in-law is. That doesn't stop me
from dreaming and sometimes building (like
my Stereo Ricohmatic 225 project).

Greg