| key specs | 
| Camera Type | DSLR Camera | DSLR Camera | 
| Effective Pixels | 20.4 MP | 20.9 MP | 
| Sensor Type | MOS | CMOS | 
| Display Size | 3 inch | 3.2 inch | 
| Battery Type | Lithium ion | Lithium ion | 
| Touchscreen | Yes | Yes | 
| general | 
| Brand | Olympus | Nikon | 
| Model | OMD EM1 Mark 2 20.4MP DSLR Camera | D500 20.9MP DSLR Camera | 
| Model Name | OMD EM1 Mark 2 | D500 | 
| Model Number | EM1 Mark 2 | D500 Body Only | 
| Series | OMD | - | 
| Color | Black | Black | 
| Type | DSLR Camera | DSLR Camera | 
| Effective Pixels | 20.4 MP | 20.9 MP | 
| Dimensions(WxHxD) | 134.1 x 90.9 x 68.9 mm | 115 x 147 x 81 mm | 
| Weight | 574 GM | 860 GM | 
| Temperature | 0 to 40 | 0 to 40 | 
| SLR Variant | - | Body Only | 
| Tripod Socket | - | Yes | 
| Ports | - | HDMI | 
| Accessory Shoe | - | ISO 518 Hot-shoe with Sync and Data Contacts and Safety Lock | 
| sensor features | 
| Sensor Type | MOS | CMOS | 
| Sensor Size | 17.4 mm  x 13.0 mm | 36.0 x 24.0 | 
| Sensor Technology | 4/3 Live MOS Sensor | - | 
| ISO Rating | - | ISO 100 - 51200 | 
| lens features | 
| Lens Mount | Micro Four Thirds Mount | Nikon F Mount With AF Coupling and AF Contacts | 
| Dust Reduction | Yes | Yes | 
| Manual Focus | - | Yes | 
| Other Lens Features | - | Lens Aperture Instant Return, Electronically Controlled, Compatible Lenses Compatible with AF NIKKOR Lenses, Including Type G, E, and D Lenses Some Restrictions Apply to PC Lenses and DX Lenses, AI-P NIKKOR Lenses and Non-CPU AI Lenses Exposure Modes A and M Only, IX NIKKOR Lenses, Lenses for the F3AF and Non-AI Lenses can not be Used, The Electronic Rangefinder can be Used with Lenses that Have a Maximum Aperture of f/5.6 or Faster The Electronic Rangefinder Supports 15 Focus Points with Lenses that Have a Maximum Aperture of f/8 or Faster, of Which 9 Points are Available for Selection | 
| viewfinder features | 
| View Finder | Yes | Yes | 
| View Finder Type | Eye-level electronic viewfinder | Eye-level Pentaprism Single-lens Reflex Viewfinder | 
| Viewfinder Coverage | 100% | 98% | 
| Viewfinder Magnification | Approx. 1.30x - 1.48x | 1.0 x 50 mm f/1.4 Lens at Infinity, | 
| Viewpoint Dioptric Adjustment | -4 ~ +2m-1 | -2 to +1 m sup -1 | 
| Viewfinder Eye Point | 21 mm | - | 
| Other Viewfinder Features | - | Reflex Mirror Quick Return Type, Depth-of-field Preview Yes, Pressing Pv Button Stops Lens Aperture Down to Value Selected by User A and M Modes or by Camera P and S Modes , Viewfinder Eye Point 16 mm | 
| focus features | 
| Focus Mode | Single AF S-AF / Continuous AF C-AF / Manual Focus MF / S-AF + MF / AF tracking C-AF + TR / Preset MF | - | 
| Focus Points | 121-point cross-type phase detection AF and 121-point contrast AF | 153, 153 Focus Points of which 55 or 15 are Available for Selection | 
| Metering Modes | Digital ESP metering 324-area multi pattern metering, centre-weighted average metering, spot metering[*], spot metering with highlight control, spot metering with shadow control | Programmed Auto with Flexible Program P, Shutter-priority Auto S, Aperture-priority Auto A, Manual M | 
| White Balancing | Auto WB, 7 Preset WBs, 4 Capture WBs, Custom WBKelvin setting | Auto 3 Types, Incandescent, Fluorescent 7 Types, Direct Sunlight, Flash, Cloudy, Shade, Preset Manual Upto 6 Values can be Stored, Spot White Balance Measurement Available During Live view, Choose Color Temperature 2500 K to 10000 K, All with Fine-tuning, Bracketing Types Exposure, Flash, White Balance, ADL | 
| Auto Focus | - | Yes | 
| Other Focus Features | - | Focal Length in 35 mm 135 Format Equivalent to 1.5x that of Lenses with FX Format Angle of View, Detection Range | 
| exposure features | 
| Exposure Mode | iAuto Live Guide can be used, P program AE programme shift can be performed, A aperture priority AE, S Shutter priority AE, M Manual Live Bulb, Live Time and Live Composite are available, Custom 1~3, Art Filter, Underwater wide / Underwater macro to be assigned to the Fn1 button | - | 
| AE Lock/Exposure Lock | Yes | - | 
| Spot Meter | Yes | - | 
| Manual Exposure | Yes | Yes | 
| Exposure Compensation | - | 1/3, 1/2 or 1 EV in Steps of -5 to +5 EV | 
| Other Exposure Features | - | Metering System TTL Exposure Metering Using RGB Sensor with Approximately 180 K 180,000 Pixels, Exposure Lock Luminosity Locked at Detected Value | 
| shutter features | 
| Shutter Type | Focal-plane shutter mechanical shutter | Electronically-controlled Vertical Travel Focal-plane Mechanical Shutter, Electronic Front-curtain Shutter Available in Mirror Up Release Mode | 
| Shutter Speed | 1/8000 - 60 sec., with selectable EV adjustment steps 1/3, 1/2, 1 | 1/8000 - 30 sec | 
| Self-timer | Yes | Yes | 
| Other Shutter Features | - | Approximate Frame Advance Rate 10 fps, CL 1 to 9 fps, CH 10 fps, QC 3 fps, Speed 1/8000 to 30 sec in Steps of 1/3, 1/2 or 1 EV, Bulb, Time, X250 | 
| flash features | 
| Built-in Flash | Yes | - | 
| External Flash | Yes | - | 
| Flash Modes | Redeye, Fill-in, Flash Off, Red-eye Slow sync. 1st curtain, Slow sync. 1st curtain, Slow sync. 2nd curtain, Manual 1/1 FULL ~ 1/64 | Front-curtain Sync, Slow Sync, Rear-curtain Sync, Red-eye Reduction, Red-eye Reduction with Slow Sync, Slow Rear-curtain Sync, Off, Auto FP High-Speed Sync Supported | 
| Flash Compensation | - | 1/3, 1/2 or 1 EV in Steps of -3 to +1 EV | 
| Other Flash Features | - | Control TTL i-TTL Flash Control Using RGB Sensor with Approximately 180 K 180,000 Pixels, i-TTL Balanced Fill-flash for Digital SLR is Used with Matrix, Center-weighted and Highlight-weighted Metering, Standard i-TTL Fill-flash for Digital SLR with Spot Metering, Flash-ready Indicator Lights when Optional Flash Unit is Fully Charged, Flashes After Flash is Fired at Full Output | 
| image features | 
| Image Format | RAW 12-bit lossless compression, JPEG, RAW+JPEG | File Format NEF RAW 12 or 14 bit Lossless Compressed, Compressed or Uncompressed, Large, Medium and Small Available Medium and Small Images are Recorded at a bit Depth of 12 bits Using Lossless Compression, TIFF RGB, JPEG JPEG-baseline Compliant with Fine 1  4, Normal 1  8 or Basic 1  16 Compression, Optimal Quality Compression Available, NEF RAW+JPEG Single Photograph Recorded in Both NEF RAW and JPEG Formats | 
| Aspect Ratio | 40300 AM | - | 
| Gross Pixel | 21.8 MP | - | 
| Image Stabilizer | Yes | - | 
| Image Sizing | 5184 x 3888 | - | 
| Still Image Size | 1024 x 768 | - | 
| HDR Support | HDR1, HDR2 painting-like | - | 
| Live View Shooting | - | Yes | 
| display features | 
| Display Size | 3 inch | 3.2 inch | 
| Display Resolution | Approx. 1037k dots | - | 
| Touch Screen | Yes | Yes | 
| LCD Display | Vari-Angle | - | 
| Other Display Features | - | Effective Angle of View Nikon DX Format, Image Sensor Format DX, Monitor Tilting TFT Touch Sensitive LCD with 100% Frame Coverage and Manual Monitor Brightness Control | 
| connectivity features | 
| HDMI | Yes | - | 
| USB | Yes | - | 
| Wifi | - | Yes | 
| storage and power features | 
| Upgradable Memory | Yes | - | 
| Card Type | SD, SDHC, SDXC, Eye-Fi Card compatible | - | 
| Batteries Included | Yes | - | 
| Battery Type | Lithium ion | Lithium ion | 
| Number of Batteries | - | 1 | 
| audio and video features | 
| Microphone | stereo | - | 
| Speaker | Monaural | - | 
| Audio Features | - | Audio Recording Device Built-in Stereo or External Microphone, Sensitivity Adjustable | 
| Video Resolution | - | 1280 x 720 | 
| Video Format | - | MOV, H.264 / MPEG-4 Advanced Video Coding | 
| modes and functions features | 
| Drive Modes | [Sequential shooting H] approx. 15 fps with selectable 10-15 fps | - |