My first guess was a star diagonal for a telescope, but I've never seen one
with a diaphram in it. Why would one ever want to *reduce* the amount of
starlight? I can't imagine.....
Then it occured to me it could be an right angle adapter to use a telephoto
lens as a spotting scope, similar to what Lee Hawkins fabricated a while
back. His design was straight thru, but with a mirror, a right angle
arrangement is simple enough. Perhaps to an older Canon (pre-EOS days)
breech mount. About one inch diameter (.960 I think) is the O.D. of
inexpensive telescopic eyepieces. (as info, 1.25 inch is the norm for most
eyepieces and 2 inch for premium ones.)
Still, the diaphram baffles me. I've only seen those on microscope
attachments. But then, there's a lot I haven't seen yet <g>. Please do
tell when you have a positive ID.
John P
______________________________________
there is no "never" - just long periods of "not yet".
Buddy Walters <ONLYOLYBW@xxxxxxx> wondered:
>
>This looks like an oversized Varimagni Finder that attaches to the lens
mount
>of an OM body.
>I'll start from the body and go out.
>1. The body mounting adapter is like, although not the same size, (and does
>not fit) as the one on the OM Bellows. It fits into a collar(1/2" deep)
and
>has a groove / locking screw so the body can rotate 360 degrees.
>2. The Body / Collar is attached to a 90 degree mirror assembly (like our
OM
>Varimagni) but is 1 & 1/2 inches wide.
>3. On the outside of the mirror (inside the box) is an "aperture -
diaphragm"
>with an outside lever to adjust the aperture with 1-5 reference marks.
>4. The mirror / aperture box is attached to another adapter collar. This
one
>is only 1 inch O.D. This collar has a grove cut into the outside as well
to
>allow 360 degree rotation to (whatever it attaches to).
>5. When looking through the 'body' side, it gives a very wide angle effect.
>Likewise when looking through the 'objective' side it gives a magnified
>effect.
>There are no "Olympus" markings anywhere on the assembly, although is seems
to
>be very well made.
>My first thought is it is some kind of telescope right angle adapter, or
>possibly for an endoscope.
>Can someone identify this thing? Anyone know what a $ value would be?
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