Astrophotographers hangout. Invite friends and notice chat bar on bottom.
This is a very nice OTA. Secondary mirror is the focuser, that is very nice. And it has heaters controlled by PC plus coolers. Wonder how real that spot diagram is, CDK might not agree, but I like this design better than any design that needs a focuser in the OTA. Eliminate flexure to be sure. Love this scope, eyeing a custom 16 inch version of it, but don't have the money, shocking!! :)