P3D Re: 65mm vs. 75mm Lens Spacing

[Ralph Johnston <copley@xxxxxxxxxxxxxxx>]

75mm spacing gets you 8 perf images with no gaps (Model B)
65mm spacing gets you 8 perf images with gaps (Model C) OR 7 perf images
with no gaps (Model A)

I am very happy with my model B.  You can use negative film and send it to
Dale Labs for prints AND slides.  Can't do that with the other models.

I can also see through both viewfinders at once, although the center
circles are not aligned.  This was handy at the NSA trade fair when I
photographed a display of back lighted lenticular prints.  I had to shift
slightly left and right to get the proper stereo effect.

See my format drawings at 

http://www.ultranet.com/~copley/StereoNE/slidefmt.html





>Date: Fri, 11 Sep 1998 23:12:47 -0400 (EDT)
>From: Tom Deering <tmd@xxxxxxxxxxx>
>To: photo-3d@xxxxxxxxxxxxxxxxx
>Subject: P3D Re: 65mm vs. 75mm Lens Spacing
>Message-ID: <v03007800b21f52c169e3@[207.237.104.33]>
>
>On 9/11/98, Dana Archer wrote:
>>I've ordered an RBT camera from Jon Golden but I need to make a decision
as to
>>what lens spacing I should order.
>>
>>I've been using a Stereo Realist with 70mm spacing for years and am happy
with
>>the results.  Would 65mm be too little or would 75mm be too much?
>>
>>Jon says that the sales of 75mm FAR outnumber those of 65mm cameras.
>>
>>For what it's worth, my eyes seem to be spaced at about 70mm.
>
>I thought the differences, viewing wise, were minimal.
>
>I assumed the issue was the spacing of the film chips.  Do it one way, and
>you get full 36mm chips with gaps. Do it another way, and get smaller
>chips, but no gaps.
>
>Just my educated guess, I could be wrong.
>
>Tom
>
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