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

Sky-Watcher Auto Focuser

  (13 Reviews)
✓ 2 year warranty


In stock 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 (13 Reviews):  
Write a Review and share your opinions!

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 .

Rating (max 5):  
Orion Friendly Focuser
Thursday, 1 March 2018  | 

Orion have an identical offering for much more money. This fitted perfectly and works very well on my Orion Xi 10 DOB.
Thanks for great service FLO

Rating (max 5):  
Sunday, 4 February 2018  | 

Very easy and quick to install (a YouTube video made sure of that) on a SW 130PDS. I wish it came with instructions though. Come to think of it, it's not even branded. Neither the box or the product had any form of branding.

Rating (max 5):  
easy mod
Tuesday, 31 May 2016  | 

fitted the auto focuser in about 10 mins.all the tools apart from a phillips driver are included as are other unneeded parts..nice smooth focus cuts down on shake.downers are the up arrow winds the focuser out and the down arrow moves it in..and to make large focus changes you fight against the motor drive.really nice easy mod..would be nice to run it from a power tank out of the box instead of batteries....recommended

Rating (max 5):  
Good, but can't be disengaged.
Friday, 7 June 2013  | 

I've mounted this on my SkyWatcher 300P's Crayford. First odd thing is the hole for the focuser lock screw is on the wrong side of the supplied bracket. If you want to use the lock off, you'll have to drill a hole in the bracket. Silly mistake SkyWatcher! Apart from that is was easy enough to fit.

As noted by others,the fast speed simply isn't fast enough, which bring me onto my main point. There is no mechanism to disengage the motor to allow you to focus manually. The only way to achieve this is by slackening off the grub screw with an Allen key. Not ideal in the dark! This seem to be a major oversight by SkyWatcher. Why not fit it with a knurled nut or some kind of latch mechanism?

On the plus side, the control over the focus is very fine at the slowest speed. This allows you to achieve very tight focus.

Read all 13 customer reviews...


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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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