Astromania 2" 90-Degree Mirror Diagonal with 93% reflectivity Across Visible ...

This diagonal works great.

+>Very nice upgrade from the 1.25" Celestron diagonal that I was using. Huge difference in brightness, fov, and clarity.>Easily gets at least 150x from a 4" refractor. Bands of Jupiter, defined rings around Saturn, better double star separation and glob clusters, etc.>Edge to edge clarity with no noticeable distortions or abberations.>Sturdy and feels solidly built.>Adapter ring included. Good thumbscrews.>Price.->Fogs up when the humidity is higher than 60-70%. Removing the eyepiece and letting it breath for a few seconds usually clears it up though.

Inexpensive 2" mirror diagonal that does not include a 1.25" eyepiece adapter. Has a cutout in the eyepiece holder for a low profile eyepiece adapter for 1.25" eyepieces. Clear aperture at the eyepiece holder is 44.5mm. The nose piece and eyepiece holder both have the same threading so are interchangeable. Solid all metal construction, except for the mirror, particularly considering the price.