Quote:
Originally Posted by RobF
I'm a bit thick David - what does the FF add to the setup? Better optical field (flatter?) or helps with physical centring/attachment of camera?  |
Well if you have a newt then you need a coma corrector, and generally if you have a refractor you need a field flattener to get stars sharp to the edge (for those like me that have cheap refractors). The hotech SCT camera adapter allows the camera to be centrally and securely aligned to the optical plane of the scope, not pushed to one side or the other. So by attaching that to a coma corrector like the baader one you get the perfect adapter for the camera - hotech have a field flattener for the refractor - I liked it so much I bought a second one for the ED80. So now I have a set - a hotech FF for the ed127 and the ed80, and now a hybrid setup for the R200SS newt I have. Alan has a Meade 10" SN with a JMI motorised focuser but he was getting stars focused on one side and fat bloated ones on the other. This setup will/has fix that problem.