Messier Objects in Sagittarius Constellation [Explored]

This is an annotated version of this picture : flic.kr/p/zEo5Gs

 

This picture is the longest I have ever captured in astrophotography (and photography too) : 1 hour 10 minutes of total integration.

 

 

I stacked 14 frames of 5 minutes exposure each, using DeepSkyStacker freeware.

 

 

An unmodified Canon EOS 600D with a 50 mm f/1.8 lens were used, mounted on a lxd75 tracking mount

 

 

Despite we can see reams of stars on this photo, some great nebulas are also visible : Eagle Nebula, Omega nebula, Trifid and Laguna nebulas ...

 

 

However, the large and ugly yellow halo coming downside is the light pollution of nearby cities. My most difficult challenge was to face to this problem while editing the picture.

 

 

Technical Datas :

Canon EOS 600D + 50 mm f/1.8 lens + meade lxd75

14 x 300 secs exposure

ISO 400

F/3.2

+5 darks frames

+20 offset frames

Done