I have always been very surprised to see that on this galaxy M64, the colors vary enormously from one image to another: there are about as many variations as there are images made, whatever the exposure times, materials and experiences of the astrophotographers!
From several sources and astrophysical data, I have tried to obtain for this image the most faithful calibration possible to reality: we can see that M64 is much less “blue” in reality than what we often see!
Details on the method and sources used are available in this article: https://millenniumphoton.com/portfolios/m64-galaxie-de-loeil-noir/
Full version here : https://astrob.in/dvpv84/0/
TSA102 f/8 – AZEQ6 – AtikOne6.0 – LRGB
L : 103 x 300s
RGB : 3 x (43 x 300s)
Ha : 12 x 300s bin2
Total : 20h05
6/7/8 April 2023 (France – 17)
Processing : Pixinsight & PhotoShop