Jay:Dee
Stellar Nursery
The Orion Nebula and De Mairan's Nebula, M42 and M43 respectively, as viewed under urban light using an Astronomik CLS Clip-Filter. The CLS (City Light Suppression) is an interference filter that blocks the light of the spectral lines of mercury and sodium-vapor lamps and lets the largest part of the visible light and H-alpha emissions pass. All the important emission lines, as well as the spectral region that the very well dark adapted eye can see, can pass through the filter. This was my first attempt at using the filter and stacking images using DeepSkyStacker. Camera used was a Canon EOS 70D, with an EF 24-105 mm lens, mounted on an iOptron SkyTracker. Location was Burlington, Ontario, 43°19'57" N, 79°46'38"W, ambient temperature a balmy -13°C under a waxing gibbous moon, no cloud cover and marginal to average transparency and seeing. Eight light frames and six dark frames, no flat or bias frames, all shot at ISO 400, f/4 for 30 seconds and 105 mm.
Stellar Nursery
The Orion Nebula and De Mairan's Nebula, M42 and M43 respectively, as viewed under urban light using an Astronomik CLS Clip-Filter. The CLS (City Light Suppression) is an interference filter that blocks the light of the spectral lines of mercury and sodium-vapor lamps and lets the largest part of the visible light and H-alpha emissions pass. All the important emission lines, as well as the spectral region that the very well dark adapted eye can see, can pass through the filter. This was my first attempt at using the filter and stacking images using DeepSkyStacker. Camera used was a Canon EOS 70D, with an EF 24-105 mm lens, mounted on an iOptron SkyTracker. Location was Burlington, Ontario, 43°19'57" N, 79°46'38"W, ambient temperature a balmy -13°C under a waxing gibbous moon, no cloud cover and marginal to average transparency and seeing. Eight light frames and six dark frames, no flat or bias frames, all shot at ISO 400, f/4 for 30 seconds and 105 mm.