Sky-Watcher Auto Focuser
 Sky-Watcher Auto FocuserSky-Watcher Auto Focuser 

Sky-Watcher Auto Focuser

  (17 Reviews)
✓ 2 year warranty


Usually shipped 1-2 working days.
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About this product

Model:  swautofocuser
Part Number:  20929

Hands-free DC focusing for precise focusing with the minimum of vibration. 

>Dual speed push-button operation (fast & slow). 

Can be used with the following telescopes: Evostar models 90/102/120/150, Startravel models 80/102/120/150, Skyliner models 150/200/250/300 & Explorer models 150/200/250/300. 

Requires a 9v battery for operation, not supplied. 

Note: Please check your telescope's focuser knob is removable (Sky-Watcher sometimes glue them on). If not then this product will not be suitable. 

Customer reviews

Average Rating (17 Reviews):  
Write a Review and share your opinions!

Rating (max 5):  
No more fiddling around
Tuesday, 21 January 2020  | 

Not set this up yet but I have one on another scope and know how they perform, thanks FLO for the price match

Rating (max 5):  
Sky-Watcher Auto Focuser
Tuesday, 10 December 2019  | 

I bought this to drive a low profile Skywatcher focuser recently added to replace the original high profile focuser on my 250 mm Synscan dobsonian. Although the steel base plates that come with the auto focuser are not designed to marry up with this particular focuser it was easy enough to make it all work by drilling two more holes in the plate and finding suitable bolts and washers to keep every thing straight and aligned. Worked well and, combined with the focuser upgrade, proved a very cost-effective route to enabling EEA on the Synscan. One watchout is that to revert to manual focusing (say when the 9v battery runs out) - the electric drive needs first to be disengaged by the somewhat inconvenient means of using a hex key to loosen off the grub screw gripping it to the focuser spindle.

Rating (max 5):  
Fantastic for DSLR lenses
Friday, 20 September 2019  | 

I have one of these connected to my Samyang 135mm lens and a HiTec Astro DC focuser ( I pasted this review there as well). I bought a 3d Printer toothed wheel and belt so as to connect this motor around the lens. I now have autofocus working brilliantly with my widefield Samyang lens, controlled by SGP. So I am always in focus

Rating (max 5):  
Great quality product and Service
Thursday, 30 May 2019  | 

Got this for my SW 150p. Easy to install, works a treat.

FLO were great as usual😀

Rating (max 5):  
Very good budget electronic focuser
Tuesday, 9 October 2018  | 

I bought the Skywatcher Auto Focuser for my Vixen VC200L tube. I was worried whether it would fit, but it does perfectly. I'm very happy with the product and also with the service FLO provided. Thanks guys!

Rating (max 5):  
Quick delivery
Thursday, 6 September 2018  | 

I never thought that the delivery would be so fast. Thanks.

Rating (max 5):  
Great Little Gismo
Friday, 17 August 2018  | 

Fast and efficient service as normal from FLO.
The Auto Focuser was fitted to my SW200P in no time at all with everything lining up and working perfectly and smoothly from the off. Luckily I had a crystal clear night on the day of fitting and was impressed by the Focuser immediately.
As with other reviews the battery compartment was a pain to close and I managed to snap the little clip but mainly due to my heavy handling of it I suspect. Also I agree with the control coil being a bit of a pain at times but overall the Focuser a great addition to my astronomy tools.

Rating (max 5):  
SW autofocuser
Wednesday, 8 August 2018  | 

The item is very nice , it came to greece very soon ( 3 days ). The comunication was very good.

Rating (max 5):  
Just right.
Thursday, 2 August 2018  | 

I found the Sky-Watcher Auto Focuser to be well made, and nicely robust, without being too heavy to upset my telescope balance, which is a 20 year old Vixen VC200L with a 2 inch rack and pinion focuser. The supplied bracket mated easily with the screws on the Vixen focus control, and it was easy to fit the motor onto the focus spindle.

What wasn't so easy was getting the focus knob off, but I used the best fit screwdriver head I could find (Stanley) and leather gardening gloves to give good grip and reduce any screwdriver through the hand effects.

My manual focuser is old, and it slowed the auto focuser motor considerably during part of the travel compared to it's even free running performance. I found that reducing the tension on the telescope focus mechanism while making sure it was still centrally aligned within the drawtube, and lubricating it with a small amount of plumber's silicone grease made the whole travel more even and easier.

The focus motor loved it. The focusing mechanism is now very smooth, with even, low level, motor noise. The motor current has reduced to a steady 22mA at fast setting, whereas before it was using 22mA in the good places and almost 50mA in the bad.

Focusing on planets like Jupiter and Saturn is a joy, no more wobbling planets to see if the focus is right, then trying again.

Yes, the battery is a bit of a fiddle to get into its compartment, but the improvement in time to reach best focus is great.

Ordering from FLO was easy, and the focuser arrived very quickly.

Rating (max 5):  
Saturday, 28 April 2018  | 

I originally installed this on my sw200p no problems ,fine focus easily achieved highly recommend reasonably priced ,battery lasts ages ,now fitted to a 200pds though bit of tweaking involved not too much you just need 2x6mm spacers i used two M6 nuts on the bracket to be able to secure allen screw to focus knob spindle. the springy lead i found to get in the way but made up my own longer lead 6 meters (rj10) an inexpensive job and used a white lead easy to see in the dark ,makes focussing so much easier would recommend .

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Q1. Can you supply a longer cable?

Sky-Watcher don't offer one but some customers are successfully using longer RJ10 telephone receiver cables.

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