William Optics 2" Dielectric Diagonal

William Optics 2'' Dielectric Diagonal


Available - Delivery 10-20 working days.

Model:  WOcfDielectric
Brand:  William Optics

Special Bundle Price - Save £14!

Buy a William Optics 2" Dielectric Diagonal and SCT Adaptor together for 119

Simply add both items to your basket to automatically receive the discount.

Premium quality William Optics diagonal with 12mm mirror thickness, dielectric coating and 1/12th lambda surface accuracy. 

The fit, finish and attention to detail is second to none! 

Supplied with 2" nosepiece

SCT adapter available separately. (Please remove one before fitting the other) 



Removable carbon-fibre side plates for easy cleaning. 

Dielectric coating for 99% reflectivity. 

Precision 1/12th lambda surface accuracy. 

12mm-thick mirror substrate. 

2"- 1.25" adapter with brass clamping ring. 

Inside diameter (48mm) threaded to accept filters. 

Weight : 535 g 

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Average Rating (2 Reviews):  
Write a Review and share your opinions!

Rating (max 5):  
Quality piece of kit
Saturday, 11 May 2013  | 

I bought this diagonal a few weeks ago and have had the chance to give it a whirl with my new 2" Baader Quicklock and also my newly purchased Hyperion Aspheric 36mm eyepiece. The diagonal oozes quality. The feel and the build quality are excellent. It just has an all round fantastic sense of solidity to it. And I love the addition of the 1.25 adapter included in the price as well. It really performs well in my C9.25. All in all very please. Buy one yourself. You know it makes sense!!!!!

Rating (max 5):  
Outstanding Diagonal
Tuesday, 12 March 2013  | 

This is an outstanding piece of optical engineering. I have a 6SE and was not happy with the stock 1.25" star diagonal. I have 1.25" eyepieces and this 2" diagonal allows me to use the mirrors central sweet spot for them. The supplied SCT adapter is a bonus as I still have an upgrade path to add a focuser when funds permit. Absolutely superb kit.

Customer Services Report
February 2015 / View Older
Positive Feedback read all 2110 comments
Enquiries Responded to within 6 working hours
Orders Completed within 2 working days