Pentax/Asahi 300mm f/4 lens
Starlight Trius SX694
Astrodon Ha,OIII,SII filters Losmandy G11-Gemini 2
SII=7x20min + 4x15min Ha=14x15min OIII=10x20min
Total = 11hrs 20min
This is the first image taken with a 300mm f/4 lens working at f/5.6 Calibration, stacking and noise reduction in Pixinsight. Final processing in Photoshop using my custom narrowband workflow.