cheers guys thanks for your reply.
mike, no flats nor darks were subtracted from this image. I know i should at least do some darks
naughty me.. I think the cause from the dust gradient was my processing skills.
rich, the C10 or NGT-10 does a fine job esp with a fast F4.7 ratio great for imaging. However since it is still a newt, i noticed abit of flexture carrying the ED80 as well on the EQ6. great processing also ken. no worries at all .
thanks everyone.