I finally got to use my favorite 90mm (actually 102mm) Mak, a Sky-Watcher 102. I’ve had it for a few weeks, bit the weather and moon position would not cooperate.
I took a couple quick iPhone pix, just handheld, single image. Not great photos but I didn’t set up the phone on the bracket as it should be.
But visually, the moon was very good! I had a Meade 8 to 24mm zoom and at 8mm, 162.5x, the image remained very sharp. Seeing was average 5-6/10.
Next time, if seeing is good, I’ll try higher power.
I did notice that the focus position is very precise. There is not a range of ‘in focus’ movement of the knob. So I’ll probably do something to make the focusing knob larger to have a little more fine control. It’s good that it snaps into focus at one point only, though, and doesn’t mush through a focus range. And I didn’t have any image shifting at all when focusing.
I haven’t even checked collimation yet. I will do that on Polaris. But judging from the visual images, it’s got to be very close.
So it looks good. The set-up with a Celestron Alt-Az mount is ultra light to take outside and move among the trees.
Edited by Joe1950, 17 May 2021 - 10:42 PM.