Sh2-155   The Cave Nebula

The image above is taken in Ha and shown as grayscale and the one below is the same but made into a false red using Photoshop which is closer to reality as Ha light is a deep red.

This image was taken on the night of 9th October 2014 and consists of 23 x 1200s exposures through a William Optics Megrez 90 telescope with 0.8x focal reducer and an Atik 460EX CCD camera with a 3nm Ha filter. It is some 2400 light years away in the constellation of Cepheus and is itself 70 light years in diameter.