Olympus E-M5 II has a 16.0MP Four Thirds (17.3 x 13 mm ) sized MOS sensor and features TruePic VII processor. You can shoot at maximum resolution of 4608 x 3456 pixels with aspect ratios of 1:1, 4:3, 3:2 and 16:9. E-M5 Mark II has a native ISO range of 200 - 25600 which can be boosted to 100 and it can save files in RAW format which gives you a wider room for post processing.
Olympus E-M5 II is not the highest resolution Four Thirds camera. Panasonic GH7 with its 25.0MP sensor is leading in this class. Check the comparison of Olympus E-M5 II vs Panasonic GH7 or take a look at Highest resolution Mirrorless cameras list.
Olympus E-M5 II DxOMark Sensor Scores
DxOMark is a benchmark that scientifically assesses image quality of camera sensors. Olympus E-M5 II sensor has been tested by DxO Mark and got an overall score of 73 for its image quality. You can find the details of their analysis of Olympus E-M5 II here.
High Resolution Mode
Olympus E-M5 II has a special High Resolution mode where the camera takes multiple images of a scene while moving its sensor using the sensor shift image stabilization system and combine them automatically to create a 40.0MP MP image. This feature works best with static scenes and using a tripod is a must to minimize stitching artifacts.
Let's look at how the size of the Olympus E-M5 II's Four Thirds sensor compares with other standard sensor sizes.
Comparison image of Olympus E-M5 II Sensor Size with other standard sensors
Sensor size is what determines the circle of confusion, and therefore how much
depth of field Olympus E-M5 II gives you at any given aperture.
You can
calculate
the exact depth of field for the Olympus E-M5 II
at any focal length, aperture and subject distance, including the hyperfocal distance
for landscapes and the very shallow focus zone you get with long telephoto lenses.
