The Horsehead and Flame Nebula in the constellation Orion is one of the most easily recognisable and iconic deep sky objects in the winter skies. It is a challenge for visual astronomers as it is incredibly difficult to see and requires a large telescope, a hydrogen beta filter and very dark clear skies and even then it is hard to see. However, for the imaging astronomer it is very easy to photograph especially in Ha light as in this image. This 21x10 minutes exposure with a Ha filter on my Televue NP127/FLI astrograph with a FLI Microline 814x camera

GordonHaynes just now Via Flipboard