4-inch Transmission Sphere--Dynaflect

Setting up my interferometer with this F/10.7 sphere was straightforward, and the Dynaflect coating produced noticeably clearer fringe patterns than my old uncoated reference.

After months of using cheaper alternatives, the Dynaflect coating on this sphere is noticeably better for reducing stray light in my setup. It threads onto my standard mount perfectly and the F/10.7 aperture gives me consistent readings each time.

Picked it up for a collimation check and the Dynaflect coating really cuts down on stray light—makes fringe patterns pop clearly. The F/10.7 design fit my test setup without any adapters, which saved me time.