Associated with 90°mirror diagonals, which let you view objects that are at a 90°angle from the direction the telescope is pointing.Improved attachment design features a brass clamping ring which does not mar, and provides a more secure connection. The SCT Adapter has a standard SCT female thread (2", 24 TPI),you can use your refractor diagonal with all telescopes having a standard SCT thread for which you can attach this diagonal directly to Schmidt-Cassegrain telescopes and many Maksutov-Cassegrain telescopes. Allows you to take advantage of the wider field of view provided by two inch eyepieces. Dielectric coatings are more durable than regular or enhanced aluminum coatings, so you will enjoy years of excellent performance from this product. The 2" SCT diagonal features dielectric coatings with 93% reflectivity across the visible spectrum and a 1/10 wave mirror for bright and true images. It fits all rear cells of Schmidt-Cassegrain telescopes and includes an adapter to use with refractor telescopes.

Item Weight: 16.7 Ounces. Finderscope: Reflex. Brand: Astromania. Manufacturer: Astromania. Date First Available: October 15, 2016. Is Discontinued By Manufacturer: No. Best Sellers Rank: #3,603 in Camera & Photo Products. Customer Reviews: 5.0 out of 5 stars 2 ratings 5.0 out of 5 stars. Item model number: SKU_AM_DM29093. : B01MA44UIQ. Item Weight: 1.04 pounds. Product Dimensions: 5.51 x 3.74 x 2.65 inches.