Quote:
Originally Posted by White Rabbit
Thanks guys.
I use CCD inspector to monitor my imaging folder live. As soon as a new image gets deposited it measures it for various attributes FWHM being one of them.
I suspect that my ever degrading FWHM has to do with three things, temprature, seeing and the angle of the object relative to the horizon. I notice that the closer it gets to the horizon the worse my FWHM gets. I'll need to add a few more focusing runs in my sessions.
I just wish to god that Software Bisque would hurry up and develop the camera add on a bit more to allow automated focusing runs between filters selection and temperature change. I'm kinda wondering why I paid so much for it when you consider programs like Astro art and the likes.
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CCDinspector is a handy program. I'll have to get that.
In CCDstack if you click on several different stars you'll get several wildly different FWHMs. Hence my scepticism. Larger stars inevitably give a large FWHM and the lowest FWHM will be a small tight star near the centre of the image.
Greg.