William Optics 2" 99% Dura Bright RotoLock Mirror Diagonal for SCTs # D-DIG2D-RO

Description

Introducing the New William Optics 2015 Dura-Bright diagonal with RotoLock # D-DIG2D-ROTO-SCT - a dramatic step forward in the evolution of mirror diagonals! This diagonal combines William Optics' excellent 2" Dura-Bright diagonal with their new 2" RotoLock eyepiece holder.
Thoughtfully designed, exquisitely machined, and artfully presented, the RotoLock eyepiece holder provides a very convenient and robust method to attach eyepieces and accessories to your telescope. Just rotate the golden grip ring clockwise to lock any inserted eyepiece or accessory, or counter-clockwise to release the accessory. Innovative design ensures that you get a very solid hold and the accessory is perfectly centered every time. No thumbscrews to worry about!
This 90° 2" mirror-type star diagonal has a Dura-Bright 12mm thick mirror, 1/12 or better wave surface accuracy, and dielectric mirror coatings for 99% reflectivity which provides higher contrast and resolution during critical planetary, lunar and binary star observations. Features an SCT adapter on the telescope side for attachment to all SCTs that have a standard 2" SCT male thread on the rear (2" x 24 TPI).
Dura-Bright features 100% real carbon fiber side plates that add that touch of class your scope deserves. 1.25" Rotolock eyepiece adapter sold separately.
The WO 2" Dura-Bright Diagonal was designed with several unique features to provide optimum performance and years of use.
Top-Notch Performance and brightness
Dielectric coating allows 99% reflectivity.
High precision 12mm thick mirror substrate flat for optimal image stability.
Polished to 1/12th wave accuracy.
Accurate design guarantees constant alignment. No further alignment needed.
Strikingly Beautiful
Patented, elegant design.
High-quality machining out of the best aluminum.
Internal anti-reflection baffling for highest contrast.
Real Carbon Fiber side plates
Superbly Constructed
Compression ring to prevent barrels from marring.
Internal safety stop prevents 2" barrels from hitting the mirror.
Additional specifications
Weight = 1lb-1.5oz (496g)
Minor Imperfection. Open Box Condition