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Thanks for the input so far.
To answer the questions, I already have a large-format CSL (for SCT/RC) attached to an RC8 and as a focuser it is a beaut. I already have another RC with a FeatherTouch so decided that I'd mount up the ED127 on my second pier and put the AP .67 reducer on the ED127 to run it at F5(ish) and so have scopes imaging at about 650mm as well as 1600.
But I don't want to have to spend any more on this setup than necessary so I planned to take the CSL off the RC and use it on the 127. I appreciate that the drawtube will be a lot shorter than the conventional refractor-type focuser but Moonlite make extenders for their bottom flanges so I'm confident that I can get both a lower flange to connect it and an extender if I need it and at a modest cost.
BUT the question remains, how much does the imaging plane hang out the back of these 127s.
Peter
Last edited by pmrid; 24-09-2014 at 06:35 PM.
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