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Hi, I have a 20" f/4 classic Obsession with Starlight Feather Touch focuser (with curved base), built in 2020. The focuser seems to have quite a low profile. I was hoping to buy the Rigel Systems nFocus motor as I already have the corresponding nFocus controller that I use with another focus motor / focuser combination. However, I am worried that the gear wheel on the motor has a diameter that is too great and will not fit on the focuser shaft without touching the base of the focuser. Does anyone have a suggestion for a make that will fit and work for my telescope, please? I am happy to have a hand controller and do not necessarily need to connect to and be controlled by my laptop. Cheers, Mike G-H

I wanted to get a tablet stalk like this one: https://www.marklessastronomics.com/netbookproduct.html#tabstalk But, alas, Charles says he has closed his business. Anyone have recommendations for a comparable product for my 18UC? Thanks, Rod

In case you want to power your telrad from your scope power rather than internal batteries. I added a 12 volt dc to 3.3 volt dc converter and a DC power connector to power up my telrad. Never have to worry about leaving the Telrad on at the end of the observation session. Richard

Hi, I was using my 20" f/4 Classic Obsession last night and encountered a problem. I was able to perform a two star alignment followed by a successful GOTO from the catalogue, but then I had to keep tapping on the Azimuth (especially) and Altitude buttons in "guide slow" setting on the hand controller to keep the object centered. I am not even sure that without these corrections the mount would have moved at all, but perhaps it was moving but just slower than it should to track the object. I have had some cable snagging issues and wonder if the power cable has become damaged or connections affected over time by this. Last night when I was setting up and moving the mount around while finding the alignment stars the set up bleeped and restarted without warning. The jog buttons work ok in all directions. Does anyone have any suggestions as to what might be going wrong, please? Regards and thanks in advance, Mike

I have had an 18” Obsession with AN n SC for 10 years. For some reason (aging brain?) SC will no longer go to an object. AN is working correctly, I can use SC hand controller to move the scope in Alt n Az direction, but Go To doesn’t work. Its has a steady green light. Can anyone help me solve this problem ? Clear Skies Leary

Hi Everyone, After spending several years immersed in astrophotography, I decided to return to my roots in visual observation. To that end, I've just acquired an Obsession 30" telescope, complete with the original ServoCat and Argus systems. The mirror is currently being sent out for stripping and a fresh coating (IAD). Given that the largest Dobsonian I've used before was a 16" Orion, I'm anticipating a whole new experience with this one. I'm planning to add a 21mm Ethos and a 31mm Nagler T5 to my setup. Does anyone have any additional recommendations for eyepieces? Thanks!

I have an Obsession 20” Classic F5 that is experiencing loss/breakage of the Ebony Star strips on the bearings. I know that Ebony Star has been discontinued for production and is NO LONGER available. Has anyone heard of an adequate replacement for the Ebony Star lminate? v/r Chuck Jagow President – Dark Skies of the Wet Mountain Valley PE – Wet Mountain Valley Rotary Club Member – Colorado Springs Astronomy Association Member - Back Bay Amateur Astronomers Member – Westcliffe Planning Commission Verdemont Observatory Rott'n Paws Observatory Gone...