Olympus OM-D E-M5 Mark II sensor review: New features, but same sensor resolution

By Paul Carroll - Tuesday April 07 2015

Sensor Review
Introduction | Olympus OM-D E-M5 Mark II measurements: No significant progress for Olympus Sensor Scores | Comparison 1: Olympus E-M5 Mark II vs E-M5 Mark I vs E-M1 | Comparison 2: Olympus E-M5 Mark II vs Sony a6000 vs Sony A7R | Conclusion

Comparison 1: Olympus E-M5 Mark II vs E-M5 Mark I vs E-M1

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Head-to-head against the original E-M5, the updated Mark II version offers a minor improvement in all sub-categories to give it that two-point lead overall, but there’s really not much in it. Compared to the flagship E-M1, which also features a 16Mp four-thirds sensor, the scores are pretty similar, too, although the E-M5 Mark II boasts slightly more favorable low-light ISO results, with a score of 896 ISO compared to 757 ISO for the E-M1.

The tables are turned somewhat for Dynamic Range, however, where the E-M1 just has the edge with 12.7 EVs compared to 12.4 EVs for the E-M5 Mark II, which equates to around a one-third of a stop better Dynamic Range for the E-M1. Take a look at Dynamic Range performance across the ISO sensitivity range, and you can see that the one-third stop advantage for the E-M1 remains the same as the ISO is increased, and that all three Olympus hybrid models offer good Dynamic Range results of over 10 EVs up to ISO 800.

With scores of 23 bits for the E-M5 Mark II and E-M1, and 22.8 bits for the E-M5, all three sensors offer similar results for Color Sensitivity, too, with good color rendition up to ISO 400, and dropping below 14 bits only at the top end of the sensitivity scale. 

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