About this product
Part Number: 20170
A direct replacement (utilizes existing bolt-holes) Low Profile CNC machined 10:1 dual-speed focuser designed for Skywatcher and Celestron Newtonian telescopes with apertures 8-12 inches (tube diameters 9-15 inches).
Silky-smooth focusing operation.
Low profile 24mm drawtube, perfect for astro-photography.
Incorporates drawtube extension so also suitable for visual use, even when using long focal length 2" eyepieces!
Accepts both 1.25" or 2" eyepieces.
|Average Rating (3 Reviews): |
Sunday, 20 January 2019 | Kenneth
This is a good quality focuser for the price. My first impressions when I opened the box was the high quality finish with of sturdy metal base and pleasing appearance. The fine focussing knob worked a treat on my homemade Newtonian reflector compared to the old rack-and-pinion focuser it replaced.
The only downside I found was that two of the four boltholes were positioned very close to, and even partly underneath, the focusing barrel. I therefore found the fitting and tightening of the bolts rather awkward. It seems to me that this is a design fault and I see no reason why the manufacturer could not have placed the two holes at a slight distance from the barrel for easy tool access. Hence the reason for the 4 star rating.
Having said that, it is still worth every penny for it's high quality and excellent performance.
Wednesday, 28 March 2018 | Steve
This is not the best focuser on the market but is very good for the price. Nice smooth action and good fine focussing. I would not recommend if you expect it to carry a lot of weight such as a filter wheel or DSLR camera but for observing is great. I replaced the stock single speed focuser on Skywatcher 8" Dobsonian and was a direct replacement, no need to adjust the holes in the tube. As I say there are better focusers but probably 2 to 3X the price as well so for observing more than adequate.
Wednesday, 20 July 2011 | Todd8137
brought this a while ago and is 100%better than the standard rack and pinion i bought it for photo work with a dslr/webcam and focus is so much more easier and precise get one you will never look back
Please fill in the form below to ask a question.
Q1. What are the fixing hole centre dimensions of the Skywatcher low profile focuser?
The hole centre dimensions in the Skywatcher low profile focuser will fit 87mm hole centres along the length of the telescope tube and 80mm hole centres across the telescope tube.
Q2. Does this use a compression fitting to hold 2" and 1.25" eyepieces?
2" eyepieces and accessories are held by a brass compression ring.
1.25" eyepieces and accessories are held by an adapter in the 2" focuser tube. The adapter itself is able to compress around the 1.25" parts so they will not be marred but it doesn't use a brass compression ring.