E-M5 does hand held infrared and tripod astro with 12mm lens in the Aussie outback

Here is an astro shot on tripod at ISO 1600, 20secs with 12mm lens at f/2.0 showing the aberrations especially of the over-exposed brighter stars in the corners, I have not done any CA or vignetting correction but have adjusted contrast a touch (there is also a slight amount of star trailing visible at this 20sec exposure):