Current Price: $113.01
Buy It Now Price: $113.01
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Astromania 2 SCT 90-Degree Mirror Diagonal with 93% reflectivity across visible"


  • It fits all rear cells of Schmidt-Cassegrain telescopes and includes an adapter to use with refractor telescopes.
  • 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.
  • 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 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.
  • 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.

Size:2" 90-degree Diagonal 93% with SCT Adapter

Astromania's 2" SCT mirror diagonal is an excellent alternative to higher priced diagonals for those on a budget or just getting started in the 2" format. The 2" SCT diagonal features dielectric coatings with 93% reflectivity across the visible spectrum and a 1/10 wave mirror. The all metal diagonal body is CNC machined. The combined result is a superb diagonal offering excellent mechanical and optical quality at a great price. You can attach this diagonal directly to Schmidt-Cassegrain telescopes and many Maksutov-Cassegrain telescopes, as long as there is a SCT male thread on the telescope. The standard SCT thread is a 2"x24tpi thread.Star diagonal is the term commonly associated with 90°mirror diagonals such as this, which let you view objects that are at a 90°angle from the direction the telescope is pointing. This allows quite comfortable viewing when the telescope is at or near the zenith. Upgrading your diagonal and switching to 2" eyepieces is one of the best investments you can make in your telescope. The wider diagonal captures more of the telescope's light cone, perfect for viewing faint, deep sky objects like nebulae and galaxies.


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This product is covered by our 60-Day Returns policy. We give you a massive 60 days from the date of purchase to decide whether you wish to keep your item or not. If you decide within this period that you don't want the item, for any reason, simply open a return case, pop it back in the post and send it to an address we'll provide. After receiving the item back, we will process a no hassle full refund within 24 hours. Return Shipping charges are to be paid by the buyer.


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Filed under: Eyepieces & Accessories