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This is a used Stellarvue 2'' dielectric diagonal. It is in excellent condition, with clean optics and only some small cosmetic marks on it. The compression thumb screw in the 2" works, but is tricky. If you've been looking for a 2'' dielectric diagonal, this one will be quite a bargain for you.
Comes in its original box, with both dust caps, and the 1.25" thumbscrew adapter.
The mirror has a protective, dielectric coating with 99% reflectivity. It has compression rings for both the 2" and 1.25" adapters (included). The two-inch insert tube has filter threads. These diagonals are double tested at Stellarvue for perfect alignment and performance.
Star diagonals are a critical component of any refractor. The performance of an otherwise excellent telescope can be seriously compromised using a diagonal that is misaligned or pinched. Each diagonal and erecting prism we sell is tested for alignment and will preserve the exceptional quality of your Stellarvue telescope.
Your diagonal comes with a 1 1/4” adapter allowing you to use 1 1/4” eyepieces. The adapter uses a compression ring and has an insert safety groove. We do not use a twist lock lever on the 1 1/4" adapter since it is more difficult to use. Some Barlows have a long insert tube. Always check before using them to make sure they do not strike the mirror.