P3D Re: Portrait oriented 41x101 slide mounts

["Grant C. Campos" <gccampos@xxxxxxxxxxxxxxx>]

Steve,

I was thinking of the image resulting from having two SLR's mounted base to
base.  The width of the mount's aperture would be limited to 23-24 mm or so,
which is the width of the image (in portrait orientation) on 35 mm film.  The
height of the mount's aperture would be limited by the viewable height in a
50's viewer (which is 27 mm in a Kodaslide) or by the height (in portrait
orientation) of the image an SLR produces (which is about 35 mm) or, as
GeorgeT pointed out, by the limitations of a 41x101 mount (30 mm or so).

Now, taking all the above into consideration, if you were going to produce new
Spicer mounts, here is what I humbly submit:

I think you could produce two:)  The first would provide the maximum 1:1.5
portrait ration for an unmodified 50's viewer, 18x27 mm (a heavily cropped SLR
image).  The second would be 22x33 which would maintain the 1:1.5 portrait
ratio, give plenty of stereo window adjustment room, be viewable in a plastic
$3.00 viewer, and be projectable.  I think a Kodaslide could be modified (in
walks George) to view a 31 mm tall image (you might have to put 45 mm lenses
in it so that the reflector will cover the image).  The only problem with the
33 mm tall mount is that it might compromise the stiffness of the Spicer
mount.

Perhaps, if you could produce only one new mount, you could compromise and
make one at 20x30.

Thanks for asking,

Grant


Steve Spicer wrote:

>
> Would you like to just clarify this for me? What aperture sizes are we
> talking about here? (Recall that Normal Realist is 21.5x23, CloseUp is
> 19x23, and the 4-Perf or Nimslo are 16x21). What size would the portrait
> mount you mention need to be?
>
> Regards,
> Steve Spicer


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