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     PRICES SHOWN ARE US DOLLARS - ADD 5% TO GET CANADIAN DOLLARS

                          2" QUARTZ Dielectric Coating Diagonal

If what you are looking for is the absolute highest achievable brightness, contrast and sharpness during critical observations with high-end instruments, the William Optics 90° 2” Quartz Dielectric Diagonal is your choice. The dielectric coating allows 99% reflectivity. They feature a 10mm thick substrate flat for optimal image stability. It uses Quartz material with a higher 1/15 lambda than the standard dielectric mirror, so it's more durable than regular mirror and will give you faster cool down period. It also processes a little bit higher contrast in brightness. The accurate design guarantees constant alignment. No further alignment needed. 

A 2” to 1.25” eyepiece adapter is included, of course. Big, knurled thumbscrews, easy to turn even with gloves on, are there to move the anti-marring brass compression rings around your most valuable eyepieces. It is a patented, elegant design that has been cut from the best aluminum. Internally, they have an anti-reflection coating for the highest contrast possible and are threaded for 2" filters. And an internal safety stop prevents most 2” barrels from hitting the mirror, but please make sure that your 1.25” accessories’ barrels are less than 64mm long, or the mirror might get damaged. Available with standard 2" barrel or SCT thread. A premium product at a reasonable price. They will become a crown jewel when attached to your scope!

If what you are looking for is a dielectric diagonal with the highest achievable brightness, contrast and sharpness during critical observations with high-end instruments, and you want the new carbon fibre look, the William Optics 90° 2” Dielectric Carbon Fibre Diagonal is your choice. A familiar high end Williams Optics product with a new look!

The William Optics dielectric diagonals are quickly getting a well deserved reputation for being quality diagonals, that not only do their job in an excellent manner, but look good doing so. This top notch performance comes from many features. The dielectric coating allows 99% reflectivity. 10mm thick substrate flat for optimal image stability, polished to 1/10th wave accuracy. Accurate designing guarantees constant alignment. No further alignment needed. A 2" to 1.25” eyepiece adapter is included, that has big, knurled thumbscrews that are easy to turn even with gloves on. Made via high-quality machining out of the best aluminum, they are internally blackened with an anti-reflection coating for the intended highest contrast. Compression rings (both on diagonal and adapter) are there to prevent barrels’ marring your valued eyepieces. An internal safety stop prevents 2” barrels from hitting the mirror, but please make sure that your 1.25” accessories’ barrels are less than 64mm long, or the mirror might get damaged.

For a limited time this diagonal comes with the standard 2" barrel and an SCT nosepiece so that you can use it on any scope. A $39 value on its own.

                                                        Part #  WD-CF-DIG2-DI (both)     $197    $168

                                            If you don't want the extra adapter, you can purchase it without  

                                             Part #  WD-CF-DIG2-DI-R (refractor)      $182   $153

                                               Part #  WD-CF-DIG2-DI-S (SCT)      $182   $153

                          Check it out and see the difference between a "budget diagonal" and a real bargain!

                                                                  Part # WD-DIG2-DI (refractor)    $135  $98

                                                        Part # WD-SCT-DIG-DI (SCT Type)     $155  $122

                                                          Part # WD-SCT-DIG2-DIS (both)     $170  $133

All the same features as the standard version, and now available with carbon fibre side plates. So you now get excellent mechanics with stunning looks.

Built like the renowned 2" William Optics diagonal, this 1.25" dielectric coated diagonal will give you all you need for a lifetime of observations with the highest achievable brightness, contrast and sharpness. You will find all the features here; machined aluminum construction, brass compression rings, large thumbscrews, matte blackened internally, high gloss black finish with satin side panels and the Swan logo laser engraved.

You do not have to renounce having a quality 1.25" diagonal, this 1.25" stands out from the crowd. 

                                    2" 90 Degree Erecting Prism  

You hate the reversed views of your star diagonal but no prism will do it for you? They heard you. Step up to the new improved 2" 90 degree Erecting Prism. Another beautiful product from William Optics. Due to the highest quality of the prism William Optics selected, this 2" 90 degree erecting prism will work quite well for astronomical observations, and it's ideal for daytime observations too. It will turn your refractor into a 24/7 friend. Internally matte blackened, it also has brass compression rings and large chromed thumbscrews that you can work by feel. Entirely aluminum, black anodized and silver sandblast finish with the William Optics logo laser engraved.

                                                    Bling, and it works great; your scope wants one!

                                                       2" 45 Degree Erecting Prism 

New and Improved 2" 45 Degree Erecting Prism. Another beautiful product exclusively from William Optics.
This piece of equipment will scream to be used with that nice premium refractor of yours! Perfect for daytime observations too. It has all the good features; internally blackened, threaded for 2" filters, brass compression rings, large chrome thumbscrews. No further description is needed: just check it out!                                                                  

                    1.25" 45 Degree Erecting Prism with 2" Barrel   

High quality 1.25" 45 degree erecting prism with 2" barrel, designed for heavy loading with bino viewers and high-power terrestrial observations. Internally matte blackened for no internal stray light reflection and threaded for 2" filters. Entirely aluminum with a black anodized, smooth finish and the William Optics distinctive golden ring. It also features anti-marring brass compression rings and a large, chromed thumbscrew. A perfect compromise between performance and price, this is one of the best erecting prisms you will find on the market right now.

 

Designed for heavy loading with binoviewer

High quality BAK4 with anti-reflection coating

Prism clear aperture of 25mm

Inside diameter (48mm): threaded to fit a variety of filters

Weight : 340 g

Part # WD-EP2(S)   IN STOCK      $95   $91  

                                  1.25 " 45 Degree Erecting Prism     

William Optics new 45 degree Erecting Prism will work with any 1.25" eyepieces and scopes with 1.25" eyepiece holders. It will turn upside down images right side-up and give correct left-to-right image. Entirely aluminum, black anodized eyepiece holder with a large, chromed thumbscrew. Internally matte blackened for no internal stray light reflection even where it is threaded for 1.25 filters. This high-quality, low-cost item will set a new standard for erecting prisms!

PART # WD-EP125     IN STOCK     $84   $80  

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                                                                                                                          Last modified: 06/26/09