Hi, I'm planning on buying myself a Mak Cass next month and have talked myself into the Orion 150mm Mak. This one does not come with a diagonal or finder. I have a red dot finder which will work fine for my purposes but I have questions regarding the back end:
It comes threaded with SCT threads, which I take to be a good thing as there are more accessories available that can connect to this thread type. While it does not come with a diagonal it does come with a 2" visual back and 1.25" adapter. I assume I would be able to use my existing 1.25" diagonal with this setup in the meantime. Is that the case?
I see when shopping for diagonals, there are types that are called "refractor diagonals" where they use either a 1.25" or 2" barrel to connect to the scope, and there are "SCT diagonals" where they attached directly to the SCT threads. Can either type be used on this? If so, wouldn't this profoundly affect where things come to focus given the extra length of using the visual back plus the refractor diagonal?
Ideally I would like to get the 2" refractor diagonal. Not for using 2" eyepieces (because I know the Mak has too narrow of a field), but because I will be able to use that diagonal in the future for another telescope. Is this a bad idea for the Mak?
Sorry for all the questions, I am just confused with options as this would be my first catadioptric telescope, and I am excited!
Oh I should mention that my goals are visual planetary and lunar, along with imaging planets and the moon using both my NexImage 5 and my Canon T2i DSLR.