This image of NGC 4725 was made on 3 consecutive nights in the Eifel, Germany, partly from Neroth observatory.
For the luminance I used all data, including the RGB. Finally I used 7,5 h of data.
Exposure:
Clear 24 x 10 min
R 6 x 10 min
G 9 x 10 min
B 6 x 10 min
TEC-140
QSI 583ws
NEQ-6
Processing pixinsight and photoshop