essentially an E-M1III and EM-1X (without the form factor) but with many updates:
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3x more powerful processor TruePic X Dual Quad Core Processor
2 stop improvement low light with “Quad Bayer Structure”
Auto ISO can go up to 25,600, whereas Auto ISO stopped at 6400 on prior cameras
extend ISO to 102,400, whereas the E-M1X/E-M1 III tops out at ISO 25,600
AF focus down to -8 EV (with an F1.2 lens)
adds a separate AF-ON button, so the camera includes independent AE-L and AF-ON buttons
improved AF tracking
2x more accurate and 3x faster AI detection AF than E-M1X and which now detects Formula cars, rally cars, motorcycles / Aircrafts, helicopters / Bullet trains, standard trains, steam locomotives / Birds / Dogs, cats
astro tracking?
7EV IBIS (8EV with dual sync OIS lenses)
5.76Mdot EVF with zero blackout capability at up to 120fps burst
higher res 1.62mdot LCD panel
larger grip
completely re-worked menu system
mechanical shutter life is rated to 400,000 shots
ProCapture and sequential burst increased to 120fps but limited to 92 frames (139 RAW at 10fps) but double that of previous E-M1 cameras
50fps burst with AF (with 6 PRO lenses otherwise max with AF is 25fps) and AE, 120fps with locked AF and AE
Buffer allows 90 frames using a ProGrade Digital UHS-II SD card with 250
MB/s write speed and then takes 25secs to clear but you can continue to shoot at 50 fps, albeit with a reduced buffer. If you shoot 90 frames and wait a few seconds, you can shoot another burst of 10 photos.
HiRes modes 25Mp, 50Mp handheld plus 80mp tripod, these are completed twice as fast as in the EM1III
Live ND now has a 6 stop ND mode
4K video to 60p 202Mbps now with either UHD or DCI ratio
can shoot for up to 90 minutes on a single battery, before the battery is exhausted and for over 2 hours when using an external power source without overheating concerns
can output 4K Raw video: C4K, 60p, 4:4:4, 12-bit external recording using Apple ProRes RAW with Atomos Ninja V support
1080p video now up to 100/120/200/240p
can use as a very high quality webcam using Olympus’s free webcam software.
two UHS-II SD card slots, up from a single UHS-II SD card slot and a second non-UHS-II card slot in previous cameras.
Bluetooth 4.2 LE image view/transfer option in addition to Wifi/QRcode remote control
firmware can be updated wirelessly using your smartphone
new 17Wh 520 shot BLX-1 Li-ion battery 25% more power (but compatible with BLH-1 battery) and camera has USB-PD charging (9V 3A) as with E-M1 III; No external charger comes with the camera but it can be charged or operated over its USB-C socket;
IP53 weather rating
599g w batt/SD card
$US2199 / $AU3288