Thanks for the info and explanation Jase, you're a legend
I knew I could count on you.
That image is incredible. I imagine the large bright blue stars in that image are scattered stars from the plane of the milky way i nthe same area of sky from our vantage point, rather than true members of the glob?
Even in that image, a lot of the fainter denser parts of the glob are whitey/blue in colour, so I guess you're right about the overall "haze" from the starlight, rather than a true indication of the type of age of the star.
When you talk about colour balance and calibrating with a G2 type star, how is that done?