P3D RBT Spacing/ Mounting

[Jon Golden <3dman@xxxxxxxxxxx>]

>> Dana Nibby wrote:
How expensive, how large, and how heavy is an RBT? This is a full-frame 
camera, yes?

I suggest sending for new literature Dana.....too much to clutter up P3D
with.

>> Dana Nibby wrote:
>>Do RBT pairs not need to be mounted? What I'd give to not have to 
hand-mount slides...

YES and NO...see below.

>>Gabriel Jacob wrote:
The impression I got was that most RBT models still have to be
hand mounted (especially the 7p versions).

Gabriel and Dana ...and all....note the exposure sizes and spacing
information at the end of this message.  There are NO European (7P)
sizes for RBT cameras...but you CAN mask down to European (7p)
format....or the REALIST (5p) or NIMSLO (4p) formats if you need
to...that is a creative decision of the photographer.

RBT cameras are either 23 x 33mm and you have to hand mount....or there
are the 109-B and X-B series 75mm lens spacings, which give you standard
24 x 36 exposures, that can be commercially mounted in 
2 x 2's  For that reason...95% of the RBT 109 X2V2, X3, and X4 cameras
that I have imported have been 75mm.


Gabriel wrote:
>>Since these are simamesed cameras, the non-consistent spacing (even in 8p RBT slides) between black borders doesn't lend themselves well to automated cutting equipment. Then again it's been reported that some RBT owners do get their slides back as 2x2 and just pop 'em into two 2x2 viewers for 3D viewing bliss. :-) 

Dana....honestly I have NEVER sent one RBT camera back for service for
this problem. The RBT 75mm spaced cameras DO have a slightly irregular
spacing...but not enough to cause any problems with machine mounted
processing.  I dont recall, in the time I have been involved with RBTs,
one camera having this problem to the point where machine processing is
a problem.  Certainly the question arises....but no problems
otherwise...if you know someone with this problem...please let me know.

Other than that...here are the lens spacings and exposure sizes for all
avaliable RBT cameras.  Regar-D-D-D-s


_____


Different stereobases allow you to take different types of stereo
pictures. The average person has eye spacing of 65mm. Therefore, a
camera with 75mm lens base gives you an enhanced (hyper) stereo effect
which is good for distance shots,  but cannot capture close up
subjects.  Conversely, a camera like the S1B, with a 45mm stereobase,
can get extremely close (as near as about 18 inches) for shooting
smaller subjects, but is less effective on distance shots.  Realist,
Revere and the older standard cameras typically had 67-71mm bases (a bit
hyper) and you could get as near as about 2.5 feet with some of them
before losing focus.

The figures given below are the number of stereopairs each camera will
take with a roll of 36 exposure film. Most of the cameras have
nonstandard exposure spacing and therefore require hand mounting of the
film chips. The X-B 75mm base cameras DO have standard spacing and can
therefore be mounted by any standard processor.

All X-A 65mm base models produce 20  24 x 33mm pairs per roll.
All X-B 75mm base models produce 18 full frame pairs (24 x 36mm) with
standard exposure spacing, the film can be mounted to 2 x 2's with
standard processing.
All X-C 65mm base models produce 13 full frame pairs per roll.
All S1A 59mm base models produce 15 full frame pairs per roll.
All S1B 45mm base models produce 15 full frame pairs per roll.

I hope this clarifies the issue for you, if you have further questions,
please contact me, I would be happy to hear from you.

Regard-d-ds 
Jon Golden


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