That's superb Mike. I have often seen some blue edges when I have imaged this down at Bigga and its often not shown but I did not know it extended so far.
Out of interest which camera/scope got the bulk of that blue? Is this refletion nebulosity or an O111 area? I think some of it at least is O111 as I noticed it in some O111 I have recently captured but I did not see it extend that far.
Magic. One of your best images. I think this formula of combining quality data from the past or from multiple scopes is very good indeed and is utilising all that earlier hard work to capture the data.
Now you've set Marc on a mission to explore the blueness of M8.
Greg.