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SIR PATRICK MOORE 1923-2012

Norman Lockyer Observatory.
#1

SCT Crayford focuser.

in Equipment and Processing tips Tue Jul 10, 2012 10:28 pm
by Leonis • 1.287 Posts

Has anyone used one of these on their SCT? They are supposed to help achieve better focus for imaging.


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#2

RE: SCT Crayford focuser.

in Equipment and Processing tips Thu Jul 12, 2012 1:43 pm
by Ron • 323 Posts

Havn't got one but you would still need the original focuser for coarse focus, using the Crayford for fine focus .
It won't cure mirror flop so I don't know how much it would be worth.
The standard focuser can be improved by fitting a disc of about 75mm diameter 15 mm thick over the standard knob. This wll give the effect of a fine focuser because moving the larger diameter "wheel" will give a finer control.
You can buy such things but I've only seen them on US websites.
Ron

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#3

RE: SCT Crayford focuser.

in Equipment and Processing tips Thu Jul 12, 2012 2:14 pm
by Ron • 323 Posts

Just found a website withe sort of thing I meant.
http://www.scopestuff.com/ss_foc9.htm

Ron

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#4

RE: SCT Crayford focuser.

in Equipment and Processing tips Thu Jul 12, 2012 3:21 pm
by Leonis • 1.287 Posts

Thanks Ron. I read quite a bit about the SCT crayford focuser and people have said that for fine focusing it is excellent. the focusing disc seems a good idea as well!


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#5

RE: SCT Crayford focuser.

in Equipment and Processing tips Thu Aug 02, 2012 11:56 am
by deepskysteve • 6.577 Posts

For a quarter of the price and a rubber band fit an a electronic focuser John
Steve


Celestron CG5 Goto with C6 & William optics Z66. Williams ZS70, (Meade DSIPro2 Mono Skycam), Lifecam HD webcamera, Watec 902H, SPC900 webcam, Logitec Pro 4000 webcam, Atik 314L+ Nextimage 5 camera, IFLY4 Quadcopter, H.A.L scratch built Quadcopter GPS full autonomous machine.
http://www.flickr.com/photos/deepskysteve/with/9135237742/
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#6

RE: SCT Crayford focuser.

in Equipment and Processing tips Tue Oct 29, 2013 1:21 pm
by Herbig • 724 Posts

I;ve just fitted one of the Focus discs to my SCT but not had any chance to try it yet!


Takahashi TSA102S, William Optics GT81 and Zenithstar 66SD APO, 5" AE Luton Refractors, , Celestron C8 SCT, Coronado PST, Mounts: Skywatcher NEQ6 & iOptron Mini Tower Pro, Meade 5000 series EP's and other bits, Atik Titan, Meade DSI, Lumenera LM075 Mono CCD's, Canon 5D mk3, Atik manual filter wheel, Baader filters.
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