Seldom Scene Photography posted two E-MII tests to see how well the new camera performs for Astrophotography and Long Exposure shots:
The Olympus E-M1II and backyard astrophotography
The Olympus E-M1II and long exposures
The bottom line: the E-M5II is much better w.r.t. noise in long exposures than is the E-M1, and the E-M1II is better than both of them. The E-M1II is nearly good enough to not need Noise Reduction — and this, with a 60 second exposure!
Shots under ISO 3200 (4 second exposure) show the Earth’s motion via “smearing” of the star images, but there’s not much sensor noise in those frames. As you can see, sensor noise really starts picking up around ISO 3200, but ISO 6400 at least should be usable with post-processing. Not perfect, but quite an improvement from past OM-D bodies!
There are many user tests and reviews posted on our E-M1II Facebook page (Click here).