William Optics 1.25 Inch Dielectric Diagonal

You do not have to renounce having a quality 1.25" diagonal! Built like the renowned 2" WO diagonal, this dielectric coating diagonal will give you all you need for a lifetime of observations with the highest achievable brightness, contrast and sharpness. A premium product at a discounted price. Check it out and see the difference between a "budget diagonal" and a real bargain!

Top-notch Performance and Brightness

• Dielectric coating allows 99% reflectivity.
• 10mm thick substrate flat for optimal image stability.
• Polished to 1/10th wave accuracyPre-coated Flat Accuracy
• Accurate design guarantees constant alignment. No further alignment needed

Meticulous Craftsmanship

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

Strikingly Beautiful

• Patented, elegant designPatented
• High-quality machining out of the best aluminum
• Real Carbon Fiber side plates
• Internally antireflection threaded for highest contrast

Superbly Constructed

• Compression ring to prevent barrels’ marring
• Internal safety stop prevents 1.25” barrels from hitting the mirror

Why 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!