Bill,
I still don't get it.
What is the purpose of the camera with the back off set to "B" ?
...Wayne
> NSURIT@xxxxxxx wrote:
>
>
>
> In a message dated 10/24/2005 9:25:35 P.M. Central Daylight Time,
> danmitchell@xxxxxxxx writes:
>
> Could someone explain this again? I've tried the painting-with-light
> thing by opening the shutter of a camera and waving a flashlight around
>
> to illuminate the scene -- that worked fine, but there was still the
> back on a camera and film in it.
>
> What's the advantage of having no back on the camera? The only way I
> can see this making sense is if there's a second camera around to take
> the shot, and the first (backless) one is somehow being used as a way
> of
> redirecting the light through the lens, but I'm not seeing how that
> would be a good thing.
>
> I guess this would let you see 'from the outside' which bits of light
> would go into the (backless) camera or something? But having just tried
>
> it, I can't work out how to get the geometry set up so that the
> taking-the-photo camera can see both the light-through-it camera and
> the
> scene that's being illuminated by the light-through-it camera.
>
>
>
>
> Well the project is done and what follows is how it was accomplished.
>
> 1) Took the back off the camera.
>
> 2) Put mylar material on the front of two flashlight (one little
> mag-lite
> and one that takes three of the c cells).
>
> 3) set shutter for B, aperture at 1.4 and use a cable release to lock
> the
> shutter open.
>
> 4) place black paper snout on front of both lights and shine small light
>
> thru the lens from the back side.
>
> 5) Use large light to "paint" the front area I wanted illuminated,
>
> Results were pretty good, although I would have preferred not using the
>
> cable release.
>
> Bill Barber
>
>
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Wayne Harridge
http://lrh.structuregraphs.com
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