P3D Re: RBT mounts

[Paul Talbot <ptww@xxxxxxxxx>]

Dr. George A. Themelis wrote:

> The 4p
> (Nimslo) mounts are asymmetric and they normally crop the image
> more at the top (to block the exposure light indication from the
> Nimslo camera).  But, if you want to crop the bottom in purpose
> (in non-Nimlso slides) then you can use it upside down and you
> can also switch orientations in the black and white parts to
> crop *both* top and bottoms.

Good information to know, thanks!

I'm working on designing a new cardboard mount that will have
a lot of top and bottom cropping--a strongly landscape view.
Just a day or couple before Linda's question I was considering
the question of where to place the aperture on the vertical
axis:  Centered?  With the same top position as a normal 5P
mount?

Paul Talbot