This 32mm guide scope with tube ring is a great choice, as its small size and weight means it doesn't weigh down the scope's mechanics and has all the features you'd expect from such a device.
The small scope's aluminum housing provides a threaded helical focus adjustment. Its 1.25" eyepiece mount features a clamping ring solution that protects the camera tube from being pinched and also reduces the chance of the screw being pushed off the optical axis. But not only does it have a 1.25" connection, it also has a standard T2 (M42 x 0.75 mm) thread, making it compatible with almost any camera.
The 32 mm guide scope's tube ring can be easily attached to the dome of SkyWatcher finder scope, for example, and in addition there's a 1/4 inch photo tripod thread in the bottom of the leg.
The high quality 120mm focal length optics with F/4 aperture have a multi-layered (green) FMC reflective coating that not only protects against internal reflections but also maximizes light recovery. It weighs 342 grams.
