Has anyone done analysis on mount vibration from counterweights? Assuming one is well within the total weight capacity of a mount/head, would it be better to have two counterweights near the top of th

I had a similar problem with an Orion Sirius Mount. Orion has a pier extension that raises the equatorial head about 10”. It might fit this mount, but I do like Bob’s idea of moving the tube forward i

#EXOS2

Thanks for reposting this Jerry. It’s a great message. I started doing astrophotography in the mid-80s, in the bad-old-days of film and manual guiding. I spent hours hunched over an illuminated reticl

Darryl, I’ve not had this problem with my ES mount, but I did have similar issues with the Orion Sirius I was using a few years ago and the Celestron Evolution I used. Various causes included my locat