Fuji X-T2 and Olympus E-M1 Mark II (E-M1.2) are currently the best cameras in their respective sensor categories. Fuji X-T2 has the latest 24 megapixel APS-C sensor with Fuji’s proprietary X-Trans array while E-M1.2 features the new 20 megapixel Micro 4/3 sensor (No, it’s not the same sensor as Olympus PEN-F or Panasonic GX8).
Fuji cameras have always been regarded as the high ISO champions due to their ability to produce excellent files at very high ISOs. On the flip side micro 4/3 sensors are mostly considered to be “good light only” sensors because in general they are not able to produce usable results at high ISOs.
I have been testing both cameras side by side and have been very pleasantly surprised by the improvements that Olympus has made with this new sensor. Despite E-M1.2 having a smaller sensor (larger sensor = more light on sensor = better high ISO performance) compared to Fuji counterpart, it is producing excellent high ISO results that I find just as good as Fuji.
Following are some comparison that I’ve done. Granted these are not scientific tests and I am not here to convince anyone one way or another but for me they were an eye opener on how good micro 4/3 sensors have become.
Due to different aspect ratio of the sensors (Fuji is 3:2 and Olympus is 4:3), I have cropped pictures to achieve as close framing as possible. All pictures are OOC jpegs with no NR applied.
Olympus E-M1 Mark II (ISO 25600)
Larger size picture are available on my Flickr page.
Just wanted to add that my findings about E-M1 Mark II high ISO capabilities are not an anomaly because DXO Mark concluded the same that E-M1 Mark II can hold its own among the best APS-C sensors in the market. Unfortunately, DXO does not test sensors in Fuji cameras due to their unique X-Trans array but Sony A6500 is supposed to have the same sensors but with regular Bayer pattern array.