Thanks
Still learning about photoshop so my have got the colour balance a bit off. I might have another go at it and see.
Regarding length of sub that seemed about right and I was not 100% sure of the guiding. I did manage to get one exposure that night guiding off what I think was noise which produced a really weird result. I've got a shot of Orion which I'll post shortly which was using PS HDR option to reduce core blowout.
Cheers
Rod
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