Astro Essentials 2'' 35mm Focus Extension Tube
 Astro Essentials 2'' 35mm Focus Extension TubeAstro Essentials 2'' 35mm Focus Extension Tube 

Astro Essentials 2" 35mm Focus Extension Tube

  (8 Reviews)
✓ 2 year warranty


18x in stock shipped 1-2 working days

1 x Customer Return Available

Astro Essentials 2" 35mm Focus Extension Tube

£23.00 £18.00

About this product

Model:  ae_2inch_ext_35mm

Useful 35mm focus extension tube. 

Brass compression fitting with two fixing screws. 

Two-inch nosepiece with milled safety undercut (prevents it falling out of focuser if clamp screw loosens). 

Threaded to accept astro filters. 

Machined from black-anodised aluminium. 

Customer reviews

Average Rating (8 Reviews):  
Write a Review and share your opinions!

Rating (max 5):  
Useful Extension
05 May 2023  | 

Well made part that does the job. Pleased that it has an undercut on the nose for safety and 2 fixing screws at the back.

Rating (max 5):  
It does the job I had for it
24 November 2021  | 

It's fine. Using it as a permanent modification to a 1970's focuser, 'Araldited' into the plain brass drawtube.

Rating (max 5):  
Astro Essentials 2" 35mm Focus Extension Tube
22 June 2021  | 

Good quality build and great delivery service from Flo as always

Rating (max 5):  
30 April 2021  | 

Having acquired a second-user Skywatcher 250p Flexi I was at a loss as to why I couldn’t obtain focus with the 2” eyepieces although the 1.75’s were behaving themselves. I hadn’t needed to bother with extension tubes with my other ‘scope, an Evo8 but a little research led me to this lovely bit of kit and the problem is solved, so full marks to Astro Essentials and also to FLO for getting it to me within 24 hours!

Rating (max 5):  
Perfect for my Vixen R200ss
21 December 2020  | 

Just what I needed to increase the backfocus for my R200ss

Rating (max 5):  
Great product
21 December 2020  | 

Great product. The quality is great. It fit very well with my 2" focuser and my Hyperion eyepieces. If you are using Hyperion eyepieces and Skywatcher Dobsonian you will need this extension to get focus.

Rating (max 5):  
Good quality and works perfectly
13 October 2020  | 

I needed something to help with getting sufficient back focus with my 3x Barlow when imaging Mars. This works perfectly and is decent quality too.

Rating (max 5):  
Replaced Sky-Watcher 200p Dop 2" extension with this one.
21 August 2020  | 

The standard 2” extension that is supplied with the sky watcher Dob is a crock of crap. It is too long so it does not give you enough back focus to remove the focusers form the line of sight of the primary.
The Astor Essentials one is perfect at 35mm and the brass compression ring secures nice and tight without marring.

Thanks to FLO for suggesting it. A bonus points is that it takes 2” filters so if you are juggling eyepieces at night you can attach a filter to the adapter, and not have to faf getting it off and on between changing out eyepieces.


Please fill in the form below to ask a question.

Please add the two numbers

Christmas at FLO:    Extended Returns    |    Last Delivery Dates    |    Astronomers Gift Guide    |    Kids Gift Guide    |    Beginners Telescope Guide    |    New Telescope Accessory Guide    |    Gift Vouchers