This is for anyone that may be curious about what the StarPro mounts' slow-motion controls and clutches look like "under the hood". You may be considering buying one of these models, or already own one.
I have found these to be excellent starter telescopes and can be a nice gift. The mount and tripod unit is well made, stable, sturdy and highly portable. I have both the 70mm and 90mm. The 70mm was purchased as an economical "grab & go" telescope. I liked it so much that I wanted to try a 90mm. Once I learned how to use it right, image settling time for the 70mm is 1 second at most and usually less. Before adjusting the 90mm, it was noticeably more, but now it is about 1.5 seconds and 2 at most. On both scopes, It took a little getting used to the spring stalks on the control knobs and to gently release them without any bounce. This is pretty much the primary source for image shake. Although, the spring stalk design is definitely a needed safety feature to help prevent snapping off the 1/4 inch brass control shafts, when moving the telescope about.
Out of the box, slow-motion controls on the 70 were near perfect in operation. The more recently purchased 90mm needed adjustment. Both altitude and azimuth controls were much too stiff -- even with the clutch fully off. I found this to be the main cause for image shake, when tracking with the slow-motion controls.
There was, however, one thing about the 70mm altitude control in free tracking (clutch disengaged) that could be better. It was too loose. When taking tension off the clutch, the scope would droop, if not near perfectly balanced. This became annoying when changing eyepieces of different weights. In addition, the azimuth (horizontal) clutch knob needed to be quite tight, to allow the slow motion to engage and this also could be better.
So, I decided that a look under the hood of both telescopes was in order, to see what was going on. Photos were taken as the adjustment process went along. It was a surprisingly simple process and much easier than other alt-az mounts, including a few earlier Meade models and a Vixen Mini-Porta Mount.
The first photo that follows this introduction just shows the two scopes, side by side, in their maximum elevation-declination positions. The mounts are the same for entire line.
Edited by Veridian, 13 June 2021 - 03:27 PM.