I'm looking to upgrade my current finderscope, ideally with a RACI in the 50-70 mm aperture range that can also act as a guidescope for astrophotography with an SCT.
I like the Orion 60 mm guidescope but it won't work with a diagonal so I think I must look elsewhere.
The only item I've found that meets my needs are Stellavue's 50 through 80 mm finder scopes. They are RACI, but the prism can be unscrewed from the OTA and replaced with a straight through helical focuser for autoguiding. Is there anything else out there like that? Do you guys have any suggestions that might work better?