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William Optics Dura Bright 2" Carbon Dielectric Diagonal - D-DIG2D-C-DB


William Optics Dura Bright 2" Carbon Dielectric Diagonal

This William Optics Dura Bright 2" Carbon Dielectric Diagonal is a mirror diagonal that will knock your socks off! The high quality 90° 2" star diagonal uses a 12 mm thick mirror, polished to 1/12th wave accuracy, and dielectric mirror coatings to achieve a 99% reflectivity! This provides higher contrast and resolution when observing planets, the Moon, and binary stars.

Easy to Use

This Dura Bright Diagonal comes with a 2" to 1.25" adapter, so you can easily use either 1.25" or 2" eyepieces, and be rest assured that the included lock screw will safely hold your eyepieces in place. Additionally, the diagonal is threaded for 48 mm filters. The large knurled thumbscrews are easy to turn as well, even with gloves on!

Built in compression rings on both the diagonal and adapter will help prevent marring on accessory barrels.

Diagonal Design

William Optics has crafted this diagonal by CNC machining the body out of high quality aluminum. There is internal, anti-reflection baffling to provide high contrast when observing. Mounted on the sides are real carbon fiber plates!

The 2" diagonal includes an internal safety stop to keep accessories from hitting the mirror.


William Optics has designed this diagonal to work with telescopes such as the FLT 98, the FLT 110, GT/GTF 102, and the FLT 132. Though the diagonal was designed to work well with the listed scopes, it is not limited to these scopes only.