Skip to content

UPS Shipping Delays / COVID-19 Response Statement

Apertura 2" Quartz Dielectric Diagonal - A-D2Q

shipping truck Free shipping

Apertura 2" Quartz Dielectric Mirror Diagonal

The Quartz Mirror Diagonal from Apertura nearly eliminates focus position changes resulting from thermal instability, which is one less thing you will have to concern yourself with when using your gear out in the field. Thermal stability means less focus position adjustment during evenings that experience considerable temperature variance.

The Apertura 2" Quartz Dielectric Diagonal has Dielectric Coatings with 99% reflectivity across the visible wave spectrum, a 1/12th wave mirror, is CNC Machined and looks great in any telescope!

It accepts 2" filters and includes a 1.25" - 2" eyepiece adapter so the diagonal will accept both 1.25" and 2" eyepieces. It features a non-marring compression ring on the diagonal body and the 1.25" to 2" adapter.

The diagonal weighs 1 lb. without the 1.25" - 2" adapter and 1.3 lb. with the 1.25" - 2" adapter.

This Product Comes with the Apertura Absolute Warranty!

  • Two-Year Warranty against product defects.
  • Three-Year Accident Replacement Program that begins after your initial 2 year warranty expires.
  • Your Apertura Absolute Warranty is transferable.

Download a copy of the Apertura Absolute Warranty for more information on this program, how to make a claim, and why it is important to keep your original receipt and the product's original boxes & packaging!