Without a flattener in the imaging train, as long as you can bring the camera to focus, you're done. You probably *should* be using a barlow. SCT's have a very large focusing area--but if you use a flattener or reducer, you are restricted to that the focal point must be a specific distance *from the reducer*. This is not the case with planetary imaging.
Your main challenge should be focusing. You can focus on the object (planet) but it may be easier to focus on a nearby bright star using a Bahtinov mask, then sync your mount, then slew back to the planet. When you sync on a nearby object (how you do it depends on mount) the slew should place you close enough to view the object in the camera. If not, you can always fall back on a flip-mirror diagonal.
thanks for that. I wonder if there is anybody with a counter argument, one thing I do remember is the celestron white paper did mention a specific back focus for the edge 11. they even made a camera adapter just for that purpose.
maybe it is because the edge has that built in flattener. but I never used that distance when I was starting with my dslr and it seemed to work fine
Edited by adamphillips, 20 October 2019 - 10:50 AM.