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hi Colin and Louie
thank you so much for your input it is much appreciated I don't get a lot of time to do imaging but have been doing it for a while now say 2 years .
and It does not seem to be getting any better seem to have hit a wall .
I thought the guiding was pretty good I use PHD 2 with a William Optics mini guider the graph seems very flat when guiding even at 10min subs .
I have attached a RAW sub frame where the stars seem as being nice and round but maybe my eyes are not seeing what you are seeing .
this is 180 sec sub captured in Nebulosity 4 I also do the stacking and debayering in the same program and the basic processing .
the imager is a Sbig STF8300C (COLOUR ) and guide camera is a STI Sbig guide camera .
the cables are secured properly to prevent flexure or movement .
maybe when I am stacking I am not inspecting the subs close enough for any trailed frame and they just get thrown into the mix but I have looked at some of the images on this forum taken with similar subs and they look spectacular
I wish I could spend more time on this but work and family commitments bring my time at the scope to a minimum but I am guessing I am not alone .
many thanks for taking the time to help guys I do appreciate it very much
cheers Pete
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