Quote:
Originally Posted by 04Stefan07
Is it possible to swap out the camera for a diagonal and eyepiece if you want to do visual or an alignment or do you need to remove the entire OAG?
Also recommendations on one?
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I've got a 2" nosepiece on the front of my OAG so its easy to remove camera, FW, guidecam and OAG all as one unit and move to other OTAs.
They can be fiddly to set up, especially if you throw a focal reducer into the mix. But I just got lots of spacers and shims and parfocal rings and worked out the right combo.
Started off with the ZWO OAG (11mm thick) but managed to break it and replaced it with the TSOAG27 (27mm thick) as I have plenty of back focus and it is easier to adjust. I also made sure I have all the right size allen keys (little ones) so the screws can be tightened up firmly. The main advantage of an OAG is elimination of differential flexure but if the OAG bits are themselves able to move you've got the same problem.