Crummy pictures, but it works, produces adequate images (even with the chipped diagonal).  Collimate is much quicker  and more precise than the Paleolithic cell and Diagonal Holder I had before.  The next step is figuring out how to mount it for photography.   There is a 1/4-20 threaded hole in the bottom of the tube,  but I am reluctant to trust a hole threaded in PVC that much.   There are 4.5" mounting rings available (I think)  that will screw to a tripod more securely.



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