Astro Essentials Sky-Watcher 9x50 Finder to T Adapter

Astro Essentials Sky-Watcher 9x50 Finder to T Adapter

  (11 Reviews)
✓ 2 year warranty


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About this product

Model:  lynxastro_sw_9x50_finder-t_adptr

Enables you to fit a guide camera with T thread directly to a Sky-Watcher 9x50 finder-scope. 

Will also fit other similar finder-scopes from Orion / Celestron with a fine M51 x 0.75 thread. 

Can also be used on right-angled finder scopes but you will need a 40mm T extension to provide the necessary focus. 

High quality, CNC machined, anodised aluminium.

  • Overall Length: 12mm
  • Knurled Grip: 2mm
  • Finder Scope Thread: M51 x 0.75
  • T Thread: M42 x 0.75

Note: Finder scope threads are fine and often have small particles of paint/plastic in them so we recommend cleaning the threads before screwing on the adapter. Please take your time, be careful and and don't apply force. 

Customer reviews

Average Rating (11 Reviews):  
Write a Review and share your opinions!

Rating (max 5):  
Do the job
Wednesday, 22 July 2020  | 

First I could not get to focus but I did little research and what you need to do is to remove the tightening ring on the Sky-Watcher 9x50 Finder

Rating (max 5):  
Didn't work for Celestron 9x50 finder scope
Tuesday, 14 July 2020  | 

Great quality product but it did not work with my Celestron 9x50 finder scope. Tube needed to be a bit shorter in order to come in to focus.

Rating (max 5):  
Astro Essentials Sky-Watcher 9x50 Finder to T Adapter
Monday, 27 April 2020  | 

Fits and works as described - no problems

Rating (max 5):  
Friday afternoon job
Saturday, 14 March 2020  | 

i purchased this adapter to connect a new SkyWatcher 9 x 50 finder to use as a guide scope with an ASI120MM-S camera. The part had a sharp sliver of painted metal which fell off when inspected and the adapter also had a shoulder (no on the FLO image) which prevented the adapter being secured close to the camera side. It works however.


We don't often have quality issues on parts like this so we would have replaced this had you reported the sharp thread to us.

The shoulder though is intentional, it's on many of our adapters and can stop the Aluminium parts becoming jammed together which makes removal much easier.

Rating (max 5):  
Works with the Celestron finder scope
Tuesday, 11 February 2020  | 

Very easy to install, gives you a great guide scope.

Rating (max 5):  
Very sturdy adapter
Wednesday, 11 December 2019  | 

Very useful adapter, has a great grip too.

Rating (max 5):  
Fitting to a TS 8x50 finder
Friday, 5 April 2019  | 

Very nicely made adapter can't fault the build. For me though wanting to put my ASI 120MM on to a TS 8x50 finder I couldn't get focus as the adapter came. I had to machine off the knurled section down to the thread depth so it would go further into the finder's tube. That solved it. The camera now focuses. This is probably because I had a spare TS 8x50 finder rather than a skywatcher 9x50. I think the finder tube on the TS must be a few mm's longer.
4 stars because it didn't quite work out of the box for me - had it focused at infinity it would have had 5.


As you've found, these are designed specifically for the length and threads found on the Sky-Watcher 9x50 finder. They may work on others but these are the ones it's designed for and will 100% work with.

Rating (max 5):  
Secure fit
Thursday, 13 December 2018  | 

I cleaned the thread on the finder and had no problems fitting it securely to an ASI120MC-S.
The only issue I encountered was achieving focus. This required the removal of the locking ring to allow sufficient inward travel for the objective.

Rating (max 5):  
Nice item
Tuesday, 30 October 2018  | 

Did the job perfectly.

Rating (max 5):  
Well made
Tuesday, 29 May 2018  | 

Very well made little adapter, good quality and fit.

Read all 11 customer reviews...


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