Astronomy Specialist

DURA-BRIGHT 2" DIELECTRIC 90° DIAGONAL

$309.00

Quantity
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The William Optics Dura-Bright 2" diagonal is a high quality 90° mirror-type star diagonal with dielectric coatings for 99% reflectivity, giving ultra-high contrast and resolution for planetary, lunar and binary star observation. 

The high precision 12mm-thick mirror substrate is polished to 1/12th lambda accuracy for optimal image quality. Meticulously CNC-machined with internal anti-reflection baffling and carbon fibre side plates, the Dura-Bright 2" diagonal is an exceptionally well constructed piece of equipment.

The compression rings on both diagonal and the included 2" - 1.25" adapter prevent eyepiece barrels from marring. The large knurled thumbscrews are easy to operate when wearing gloves. The internal safety stop prevents 2" barrels from hitting the mirror.

The Dura-Bright 2" diagonal is threaded for 48mm (2") filters

 

Barrel size
2"
Angle
90 degrees
Telescope connection 2" barrel with M48 x 0.75 female thread
Eyepiece connection 2", 1.25"
Weight 630 g
SKU WO-D-DIG2D-C-DB

Customer Reviews

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Paul Larkin
Does just what I want

Bought this to go with a Zenithstar 81 and use it with a 1.25" Baader 8-24mm hyperion zoom eyepiece. I've nothing to compare this diagonal with but it works very nicely for me. Jupiter, Saturn, Moon - all crisp and clear through this combo (Bortle 6 skies).

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