Uploaded at: 2016-10-30 11:17:06
 
Beteigeuze

The first light, 30 seconds exposure at ISO1600, no Darkframe. Camera temperature was at 15°C.

Uploaded at: 2016-10-30 11:16:56
 
The Great Orion Nebula (M42)

The second light, 30 seconds exposure at ISO400, no Darkframe. Camera temperature was at 15°C. Here you can see the problem using a achromatic lens for imaging!