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William Optics 1.25-inch Dielectric DiagonalThis product is highly recommended
Code: D-125D-C-DB
Ultra High reflectivity precision 90 degree - 1.25 inch dielectric design


Ultra High Dielectric quoted as 99% reflectivity with precision 1/12 lambda surface with 10mm-thick mirror.

This dielectric coating diagonal will give you all you need for a lifetime of observations with the highest achievable brightness, contrast and sharpness.

Dielectric coating allows 99% reflectivity.
10mm thick substrate flat for optimal image stability.
Polished to 1/12th wave accuracy*.
Accurate design guarantees constant alignment. No further alignment needed.

Lock screw for eyepiece/adapter.
Big, knurled thumbscrews easy to turn even with gloves on.

Patented, elegant design*.
High-quality machining out of the best aluminum.
Real Carbon Fiber side plates.
Internally antireflection threaded for highest contrast.
Threaded to take 1.25-inch filters



Temporarily out of stock

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