Monthly Archives: August 2014

Milky Way Vista

Milky Way Vista (central region of our Milky Way including various nebulas such as the Lagoon Nebula (M8).

Milky Way Vista (central region of our Milky Way including various nebulas such as the Lagoon Nebula (M8).

I have a new lens! The Canon pancake 40mm f/2.8. I purchased the lens for everything except atsrophotography – but of course you know I will try it for astrophotography anyway! As reviews like this one show, the lens is amazingly sharp for general use, even compared to many canon L lenses. However, as I was to find out, the old rule applies – good for landscape doesn’t necessarily mean good for astrophotography! (so often the case). For astrophotography this lens exhibits severe distortion in the corners at f/2.8 and only becomes pinpoint to the edge at f/5.6. This did really surprise me as I’ve been very much enjoying using the lens for every-day photography and landscape photography, with those photographs coming out looking spectacularly sharp. I must get to the bottom of understanding that difference one day.

This photograph is a stack of 3 x 120 second exposures using my Canon 6D at 3200ISO from my suburban backyard (light polluted).