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Arif, the new 3 images show the problem better. All the bubbly tails all the way across the image point the same way. Not radiating out from the center as a coma problem would. Looks like the scope needs to be collimated. Do a google search for "collimate refractor" and you'll find all sorts of info about adjustable lens cells and adjusting the eyepiece/camera holder. Some use bright stars, others use lasers or cheshire eyepieces just like collimating a reflector.
Tanya's problem is coma. My images looked exactly like that with the outer stars showing comet like tails radiating out from the center. I fixed it with a Baader MPCC (Multi Purpose Coma Corrector). It' a bit pricey and you will not know the exact effect until you try it, but your coma almost exactly matches the problem of my scope.
My scope is one of the first Meade LX200 10" Classic running at f/6.3. It was only ever designed to be used with the tiny 1/4" CCD chips available at the time (20 years ago!), so the coma would not have been visible.
Oh, and Tanya, do you have a lightbox? There is vignetting showing up in the corners too. Look for Exfso (Peter) in the Cameras & Imaging Equipment forum section. His are brilliant.
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