With such statements above, I think your Edge HD is out of whack and needs alignment.
I do find the best view on the moon isn't at 350-400x. Far from it.
I have added the extension back into the 102, and now only use it in mono. It does look more like something you would use to shoot down planes, as I've added a bit of weight in the back end to move the scope up the az mount [lickity split].
I'm only in bino on the Edge now.
My SCT is collimated just fine, it has more to do with the nature of SCT's. It was my first real scope. I dont care for the SCT's that much any more, the views are not terrible but softer, and I love the pin point stars viewed through a refractor and the views through the Dob are so much wider fields of view. I guess I still keep it around for night vision Astronomy simply because the focuser is in the rear where I can sit comfortably behind the SCT. I will probably eventually dispense myself of the C8 Edge all together in favor of a ultra fast Astrograph for NV Astronomy. My Az8 set up does look like antiaircraft gun I have not tried a binoviewer on my Altair 102ED, maybe next year at some point. I am in the Q for a upgraded NVD and will be receiving it in Febuary. Unfortunately the Altair 102ED F/11 has too high of a focal ratio to be any good for NV Astronomy but I want to try it anyway with the extention removed, even if I already know the out come of that experiment. Last night I ordered a AT60ED from Astronomics ( IN STOCK ) One came up used last night on CN Classifieds and while I was checking the price of new one on Astronomics, "holy crap" in stock and only $50.00 more for a new one. I will piggyback that scope onto the Altair 102ED as second scope and a super Star finder. ( Thank you Don) The NVD will work with the AT60ED, the scale will be small enough that I may be able to fit whole Nebulae into the eyepeice. It would be nice if one scope did everything but it is also more fun to own several types of scopes, so you can have your own Star Party. For me it is much too late to save myself from the extremely addictive nature of Refractor telescopes.
HAPPY SKIES TO YOU AND KEEP LOOKING UP Jethro
Edited by Jethro7, 14 December 2020 - 10:30 AM.