Review on Alstar 45 Degree Diagonal Optical Inside by Genene Locson

I will likely update this review once I have more experience with it. My main reason for purchasing this particular erecting prism was that of all the 45 degree prisms on Revain this was the only one pictured with detachable eyepiece tubes. I want to replace the eyepiece holder with a microscope tube so that I can use the microscope eyepieces and the eyepiece projection camera adapter. As far as I can tell these tubes are 28mm thread diameter and 1mm thread pitch with a maximum of three threads.