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William Optics 2 Inch Quartz Dielectric Diagonal
If what you are looking for is the highest achievable brightness contrast and sharpness during critical observations with high-end instruments WO 90° 2 mirror Quartz Dielectric star Diagonal is your choice. We recommend this product for everyone who only wants the best.Top-Notch Performance and BrightnessDielectric coating allows 99% reflectivity.10mm thick substrate flat for optimal image stability.Quartz being a harder material it can be polished to a higher accuracy. Quartz also boasts one of the lowest expansion rate compared to other materials.Accurate design guarantees constant alignment. No further alignment neededMeticulous Craftsmanship2” to 1.25” eyepiece adapter includedLock screw for eyepiece/adapterBig knurled thumbscrews easy to turn even with gloves onStrikingly Beautiful Patented elegant designPatentedHigh-quality machining out of the best aluminumInternally antireflection threaded for highest contrastSuperbly ConstructedCompression rings (both on diagonal and adapter) to prevent barrels’ marringInternal safety stop prevents 2” barrels from hitting the mirrorWhy W.O. diagonals do not feature an Adjustable alignment system?Having an adjustable alignment system is an admission that the diagonal can go out of collimation due to poor mechanical construction. Thanks to the patented design of WO diagonals you will always have a diagonal that performs perfectly like the first day you got one!
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