Hi Guys, I was informed just recently that when you have taken your Flats, and have created a Master Flat that it should be Grey scaled before use, is this the case, or is it OK to use the master Flat as it was taken.
I ask this because as you probably know, if one takes flats with out a light box they, the Flats are sometimes, of different shades or grey, and even a little blue at times.
Thank You in response to my question.
leon
