This is a view of the California Nebula, NGC1499, captured on 7th December. This was put together using 11 x 5min exposures through a hydrogen alpha filter as luminance and red frames, and 11 x 5min through a hydrogen beta filter as green and blue frames. Taken with an Atik One and a 200mm f/2.8 lens.
Two shots taken with the Atik 314L+ through camera lenses. First off is the region in Cassiopeia around M52. This is a stack of 30 x 2 min exposures using a Canon 200mm f2.8L lens. M52 is just to the left of centre, while the fuzziness just to the right of centre is the location of the Bubble Nebula, NGC7635 – although you’d be hard pressed to recognize it from this!
Next up is the California Nebula, NGC1499, in neighbouring Perseus. This was taken through a Sigma 105mm f2/8 lens with an H-alpha filter in place courtesy of a Geoptik adapter, and is a stack of 14 x 4min exposures.
It’s possible to see if you look closely enough that the focus isn’t quite perfect. It’s surprisingly difficult to do with a camera lens – especially the Sigma – as the tiniest turn of the focuser on the lens is enough to make the stars look decidely out-of-focus!
NGC1499 is a fascinating, very photogenic object, and I can’t resist having a go at it, but an unmodified DSLR isn’t really the right tool for the job! Below is an image which is a stack of 24 x 5min exposures at ISO800 taken through the Equinox ED80. Althought the nebula is clearly there, I’ve had to overprocess it to get any real detail, hence the artifacts around the bright stars xi Persei (mag 4.0) on the right, and TYC 2369-193-1 (mag 6.4) on the left.