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Nice framing. This object often comes up with a very brown background.
That can be a bit sandy coloured in spots where the stars are very thick.
As mentioned you need a flattener to handle that in the centre sharply in focus then out of focus/coma at the corners.
Televue make a .8X reducer/flattener, William Optics make several flatteners, perhaps Borg. Most flatteners are zero
magnification meaning they don't reduce or increase magnification.
Greg.
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