I came across and ETX-90 Astro M that I could not pass up. I am wanting to de-fork it and mount to an Orion Skyview Deluxe that I currently have a ST-80 on. I have a couple questions I could use some advice on.
1. What size rings to I need to use for the ETX-90 tube? I've been unable to find anything on the outside diameter of this scope online.
2. has anyone ever mounted two small scopes side by side on the same EQ mount? Is that possible? What would I need to do that with the ETX and ST-80?
Thanks in advance for your wisdom.