|
There is a lot of talk about these scopes on CN. Basically it is a standard SCT design with a field flattener glued into the rear of the baffle tube to give a big well corrected field for AP. As this seals the tube they have had to add cooling fans to have any real chance of reaching thermal equalibrium. They have also added mirror locks aka Meade LX200's. The basic gist of the conversation is that off axis performance is very good although there seems to be some conjecture over on axis performance improvement with many owners saying this is unchanged and one owner stating that he has owned a standard SCT which did a better job. There is still reported shift when using the focuser(celestron say there shouldn't be) but mirror flop is said to have been eliminated by the mirror lock which appears to be a good design. As celestron did not change the mirror design they are faststar compatable but you will not benefit from the corrected optics as the light never reaches the FF when using this system. So the advantages over the standard celestron SCT are a flat field, cooling and mirror locks. Are they worth the extra money? At the prices lists on the OZ sites I doubt it.
Mark
|