[AJames]

Originally Posted by Terry B

This sound like an interesting idea. Do you make the mask almost as big as the scope. It will then have the secondary inside it as well or make it an off axis thing without the secondary?

Terry

All you need to do is to make the hexagon the outer opposing points being as large as the aperture, with the six edges blocking the edge. It is best to make the aperture to cover the end of the telescope tube. You don't need to do anything else - except observe the image. To change the orientation, just move the hex aperture stop about 10 to 20 degrees, and see if you can observe the Pup. Ie. It also does work visually.

Hope this helps.
Andrew