Jørgen AM
Deneb & Sadr region in hydrogen-alpha
First attempt at hydrogen-alpha 12nm narrowband using an DIY astro-modified second-hand Canon 450D and the superb nifty-fifty lens for astro. Had to remove a number of frames due to northern lights flooding the light frames, and struggled to stack and stretch the files in PixInsight and DeepSkyStacker, producing a lot of noise and banding patterns. Sequator let through some hot pixels, but can live with that as the background noise was a lot lower than wiht PI and DSS. Final edit in Adobe Lightroom. The light frames were a sea of red though, so I wonder if longer exposures at lower ISO400 may be better? Read somewhere that ISO400 is the sweet spot for dynamic range versus gain on the 450D.
Canon EOS450D (low pass-filter 2/hot mirror removed)
Astronomik H-alpha clip-in filter
Canon 50mmf1.8@f4.0
Skywatcher Star Adventurer mini mount
Skywatcher 3/8 tripod
Stacked in Sequator: (Light 29x120sec, Dark 22x, Flat 19x, ISO800, f4.0)
Deneb & Sadr region in hydrogen-alpha
First attempt at hydrogen-alpha 12nm narrowband using an DIY astro-modified second-hand Canon 450D and the superb nifty-fifty lens for astro. Had to remove a number of frames due to northern lights flooding the light frames, and struggled to stack and stretch the files in PixInsight and DeepSkyStacker, producing a lot of noise and banding patterns. Sequator let through some hot pixels, but can live with that as the background noise was a lot lower than wiht PI and DSS. Final edit in Adobe Lightroom. The light frames were a sea of red though, so I wonder if longer exposures at lower ISO400 may be better? Read somewhere that ISO400 is the sweet spot for dynamic range versus gain on the 450D.
Canon EOS450D (low pass-filter 2/hot mirror removed)
Astronomik H-alpha clip-in filter
Canon 50mmf1.8@f4.0
Skywatcher Star Adventurer mini mount
Skywatcher 3/8 tripod
Stacked in Sequator: (Light 29x120sec, Dark 22x, Flat 19x, ISO800, f4.0)