Here is my guide scope and camera set up. This scope is one of the smaller guide scopes out there and I’ve had success with it at the focal lengths I have shot at (350 - 500). It has a 30mm aperture and a 120mm focal length. The scope has a helical focuser and a lock so you can lock your focus in.
The camera is an ASI120mm-s. I have only used this camera for guiding. It is a monochrome sensor so it only shoots a grayscale image but monochrome sensors are known for being more sensitive so they are perfect for guiding. I hope to use this as a planetary camera with filters in the future. I don’t know if this is possible but I will definitely try it out and report back with images!