Kope this somewhere. not sure if it is entirely true.
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- Size: E-M5 II has no EP-2 port below hot shoe which makes it lower than E-M5 and E-M1. I am not quite sure if leaving EP-2 away is a good sign for the future.
- Image processor True Pic VII: Better than E-M5 (TruePic VI), same as E-M1. Many of features below come from TruePic VII processor.
- Image stabilization: Improved in stills compared to E-M5 and E-M1. Plus new video IS mode. I have not tested how big (or small) this improvement is in practise. Will do it later on. According to Olympus CIPA tests, this IBIS should be the better than you can find in any other camera.
- EVF: Better than E-M5, same as E-M1. Same panel, same processor and same main features.
- Swiveling touch screen: E-M5 and E-M1 have tiltable. This is better for video. Panel has same higher 1M resolution as in E-M1.
- Autofocus: Better than E-M5, not as advanced as E-M1 for stills with moving subjects. Only E-M1 has PDAF ability. E-M5 II should be better than either for video because of new optimization. I have not tested if it is true.
- Dust, splash and freeze sealing: Better than E-M5, same as E-M1.
- Video recording: Better than E-M5 or E-M1. E-M5 II has video IS, more than double bitrate (55 Mb/s), all standard frame rates, time code, adjustable exposure parameters while recording, adjustable sound level while recording, in/output for external microphone and headset. 77 Mb/s bitrate with HDMI out into recorder.
- 40/64 MP Hires shooting: Not available in E-M5 or E-M1. Gives (almost?) true 40MP resolution JPEG file with (almost?) true colors for every pixel straight out of camera. 64 MP RAW file can be opened with downloadable Photoshop plug-in.
- WiFi: Not available in E-M5, same features as E-M1 with free Olympus Image Share 2.5.
- Tethered shooting: Not available in E-M5, same as E-M1 with free Olympus Capture.
- HDR: Not available in E-M5, same as E-M1.
- Back side function switch: None in E-M5, same as E-M1
- Two part battery holder / grip: Like E-M5 (new grip, same battery holder), E-M1 has grip built-in.