William Optics SCT adapter for 2'' diagonals

William Optics SCT adapter for 2" diagonals

  (5 Reviews)
✓ 2 year warranty


6x in stock shipped 1-2 working days

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About this product

Model:  WOsctadapter
Part Number:  D-SCT-TA

This neat and effective adapter replaces the 2" nosepiece fitted to William Optics (and clones) 2" Diagonals to enable direct connection to SCT telescopes. 

Also compatible with the Skywatcher Equinox 66 and other telescopes that utilise the SCT thread. 

Easy to fit. Simply unscrew the diagonal's 2" nosepiece then screw in this adapter. 

Customer reviews

Average Rating (5 Reviews):  
Write a Review and share your opinions!

Rating (max 5):  
Not good product
Monday, 4 May 2020  | 

I found this poor to use, as could not get tight fit (when it did hard to undo) and would not move to allow angle adjustments and made squeaking noise. Ended up getting a click lock and much better

Rating (max 5):  
No problems with quality just didnt fit diaganol
Tuesday, 26 November 2019  | 

Had to return this not because of quality - just didn't fit my diaganol which was a "Williams Optics clone" -adaptor is 48mm whilst my diaganol is 45mm ?? - not possible to go from 48 to 45 easily - so other route taken.
Service good as usual

Rating (max 5):  
Has promise
Wednesday, 28 August 2019  | 

I was very pleased to find this item which appears to be very well engineered and a good match for the Williams Diagonal purchased at the same time. I've only used it for a couple of sessions so far and have found it difficult to get a tight fit quickly to the back of my Meade SCT. I have found that it slips round quite easily and requires a bit more effort to ensure security. When slewing the scope you obviously need to keep adjusting this fitting to get the diagonal in the right position. I feel sure that I will get the knack and that this will improve with further use. The lock ring space between scope and diagonal is also fairly restricted which with fat fingers or gloves impedes access somewhat

Rating (max 5):  
Not Great....
Wednesday, 31 January 2018  | 

Purchased one of these 3yrs ago,. First use I noticed the threads binding but only used it a couple of times due to ill health and work commitments. Came tonise it again recently and itís completely seized. I mean seized solid somthat not even a vice and a strap wrench can shift it. FLO unable / unwilling to assist which is a shame as Age Iíd item doesnít equate to usability or fitness for purpose. I now have to purchase another and find something to lubricate the threads that wonít migrate. Shame as I have no option other than to throw away a perfectly excellent diagonal.


We did decline to provide a free-of-charge adapter (three years is too long, even for us) but a little lube on the threads should solve the problem and replacement adapters are readily available. There was no need to throw away the diaginal.

Rating (max 5):  
SCT adapter for 2" diagonals
Wednesday, 27 May 2015  | 

I bought this for connecting my sct to a new williams optics star diagonal. The first one which was delivered was faulty as the moving part between thread and body didnt move for adjustment of the position. The FLO team were excellent in sending out a new one asap whilst also sending me the postage for returning my fault one. Top class! An essential adapter for sct to 2" diagonal


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