Hi All,
I have played around with the Hubble Artifical star indoors for collimation, using Telescope Circles.
It looks pretty well spot on in Telescope circles
I then did a 10s stack of 10 frames of Omega Centauri ( see attached ). I didn't spend too much time on the image at this point.
I still don't seem to be able to obtain a pinpoint image of Alpha Centauri, same thing doughnut becomes clearer, reaches the focus point ( a blob ), then starts to defocus again as you move further inwards or outwards as the case may be. This is using a Celestron motor focuser at rate 1.
I have ordered a Bhatinov mask, to see if that helps.
My next questions are - could this be due to heavy light pollution, or perhaps the camera is not quite the distance it needs to be from the visual back ? Is there a way of determining exactlly what this distance should be using an F/6.3 reducer ? I must admit, the wider FOV the reducer delivers, does make things just that little bit easier.
Cheers,
Doc
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