If you are looking for an affordable 2 inch diagonal this is a good one, good quality and good to the eyepieces thanks to compression rings, only downside is that its not treaded for filters
Very happy with the purchase.
I am using this diagonal on a Celestron Nexstar 8SE. I wanted to make my scope able to accept wide field 2 eyepieces and this diagonal does that and more. I like the fact that it threads onto where the visual back normally would go. It ******* on just perfectly. I have a Feathertouch microfocuser installed on my tube, and the diagonal leaves plenty of room to get your hand on the focuser. I have pointed it to zenith with a giant Explore Scientific 100 degree 9mm eyepiece in and it clears the goto mount just as well as the 1.25 diagonal did. The fit and finish of the diagonal is top notch. The compression ring on both the diagonal and the adapter work flawlessly. It barely takes a quarter turn or so to release or lock your eyepiece. Very happy with this purchase.
This diagonal is of EXCEPTIONAL quality both optically and with respect to fit and finish. However owners of older SCT's BEWARE! The threads on this diagonal were not compatible with the threads on the rear cell of my old orange tube C8. This caused the diagonal threads to lock on my rear cell when i attempted to fit it to my scope. As a result the baffle ring on my scope was irretreviably damaged and my scope has been rendered unusable. I am now having to hunt for a new baffle ring to restore my telescope to a usable state. While this is an excellent product, be VERY careful when first fitting it to your scope. If the threads are incompatible it will thread one or tow turns then lock. Be very careful when testing fit for the first time!!