ID confirmed. Nice call Robert!
Yes that is one of our 6" F4 OTA which we made about 300 and it was made in the late 70s. It looks like it is in good shape.
Paul T. Jones, Owner/Optician
Having spent more time on the collimation I must say the view is quite good, superb really. The outer edge does show coma, but the central 7/8ths is impressive for such a fast scope.
Edited by Maxtrixbass, 04 May 2022 - 10:22 AM.