In depth comparison and review of Pentax 645Z and Olympus OM-D E-M5 Mark III. Compare design, sensors, proximity features, memory capacities and other important specifications and features to easily choose the right camera for you. Our goal is to help you uncover differences between the products and find the digital camera that will best fit your needs.
| DESIGN AND DIMENSIONS | Pentax 645Z | Olympus OM-D E-M5 Mark III |
|---|
| Product Type | Digital camera - 1080p - SLR with Live View mode, movie recording | Digital camera - 4K - mirrorless system |
|---|---|---|
| Lens Included | Body only | Body only |
| Height | 11.7 cm | 8.52 cm |
| Width | 15.6 cm | 12.53 cm |
| Depth | 12.3 cm | 4.97 cm |
| Weight | 1.47 kg | 366 g |
| Weight Details | Camera body only: 1.47 kg Camera with battery and memory card: 1.55 kg |
Camera body only: 366 g Camera with battery and memory card: 414 g |
| Enclosure Colour | - | Black | Silver |
| Protection | Dust-resistant, water-resistant | Splashproof, freezeproof, dust-resistant |
| SENSOR | Pentax 645Z | Olympus OM-D E-M5 Mark III |
|---|
| Sensor Resolution | 51.4 Megapixel | 20.4 Megapixel |
|---|---|---|
| Optical Sensor Type | CMOS | Live MOS |
| Total Pixels | 52,990,000 pixels | 21,800,000 pixels |
| Effective Sensor Resolution | 51,400,000 pixels | 20,400,000 pixels |
| Optical Sensor Size | - | Four Thirds (4/3") |
| Frame Rate (Max Resolution) | 30 fps | 24 fps |
| Sensor Dust Reduction | Yes | Yes |
| Sensor Features | Dust Reduction (image sensor vibration) | Supersonic Wave Filter (SWF) |
| Image Stabiliser | - | Optical (5-axis image sensor shift mechanism) |
| Built-in Optical Image Stabiliser | - | Yes |
| Sensors | - | Digital level metre |
| PROCESSOR | Pentax 645Z | Olympus OM-D E-M5 Mark III |
|---|
| Image Processor | - | TruePic VIII |
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| LENS | Pentax 645Z | Olympus OM-D E-M5 Mark III |
|---|
| Lens Mounting Type | Pentax 645AF | Micro Four Thirds |
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| FOCUSING | Pentax 645Z | Olympus OM-D E-M5 Mark III |
|---|
| Auto Focus | TTL contrast and phase detection | TTL contrast and phase detection |
|---|---|---|
| Auto Focus Points (Zones) Qty | 27 | 121 |
| Auto Focus Features | - | Focus Peaking function, Manual Focus Check Live View |
| AE/AF Control | - | Subject-tracking AF, Eye detection AF |
| Face Detection | - | Eye Detect AF |
| VIEWFINDER | Pentax 645Z | Olympus OM-D E-M5 Mark III |
|---|
| Viewfinder Type | Optical - trapezoid prism | Electronic - OLED |
|---|---|---|
| Viewfinder Colour Support | - | Colour |
| Viewfinder Resolution | - | 2,360,000 pixels |
| Optical Viewfinder Field Coverage | 98% | 100% |
| Optical Viewfinder Magnification | 0.62x | 1.37x |
| Optical Viewfinder Dioptric Correction Range | -3.5 to +2 | -4 to +2 |
| Field of View Crop Factor | 1.3 | 2 |
| EXPOSURE & WHITE BALANCE | Pentax 645Z | Olympus OM-D E-M5 Mark III |
|---|
| ISO (Max) | 204800 | 25600 |
|---|---|---|
| Native ISO | 100-204800 | 200-25600 |
| Extended ISO (Min) | - | 64 |
| Light Sensitivity | ISO auto (100-204800), ISO 100-248000 | ISO 100, ISO 64, ISO auto, ISO 200-25600 |
| Exposure Metering | Multi-segment, centre-weighted, spot | Multi-segment, centre-weighted, spot |
| Exposure Metering Zones | - | 324 |
| Exposure Modes | Programme, bulb, manual, aperture-priority, shutter-priority, ISO priority, shutter & aperture priority | Programme, bulb, automatic, manual, aperture-priority, shutter-priority |
| Bracketing Modes | - | Art Filter bracketing, ISO sensitivity bracketing, Flash Exposure Bracketing, white balance bracketing |
| Special Effects | Natural, bright, Vibrant, monochrome, Muted, landscape, portrait, Cross Process, Bleach Bypass, Radiant, Reversal Film | Soft focus, Water Colour, Diorama, Cross Process, partial colour, Grainy Film, Light Tone, Pop Art, Pale & Light Colour, pin hole, Gentle Sepia, Dramatic Tone, Bleach Bypass, Key Line, Vintage, Nostalgia, Neo Nostalgia |
| White Balance | Custom, automatic, presets | Custom, automatic, presets |
| White Balance Presets | Tungsten light, Flash, daylight, shade, fluorescent light (cool white), fluorescent light (warm white), fluorescent light (daylight colour), fluorescent light (daylight white) | Fluorescent, sunlight, tungsten light, Flash, shade, overcast, Underwater, 2000K - 14000K |
| Shutter Type | Electronic | Mechanical, electronic |
| Max Shutter Speed | 1/4000 sec | 1/32000 sec |
| Min Shutter Speed | 30 sec | 60 sec |
| Exposure Compensation | ±5 EV range, in 1/2 or 1/3 EV steps | ±5 EV range, in 1, 1/2 or 1/3 EV steps |
| White Balance Bracketing | - | Yes |
| X-sync Speed | 1/125sec | - |
| Exposure Range | EV -1-21 (ISO 200) | EV -2-20 (ISO 100) |
| DISPLAY | Pentax 645Z | Olympus OM-D E-M5 Mark III |
|---|
| Type | 3.2" LCD display | 3" LCD display |
|---|---|---|
| Touch Screen | - | Yes |
| Display Format | 1,037,000 pixels | 1,040,000 pixels |
| Display Form Factor | Folding | Folding |
| Display Features | Display brightness control, display colour control | Display brightness control, display colour control, Touch AF |
| FLASH | Pentax 645Z | Olympus OM-D E-M5 Mark III |
|---|
| Camera Flash | - | Detachable flash |
|---|---|---|
| Guide Number (m / ISO 100) | - | 12.9 |
| Flash Modes | - | Fill-in mode, rear curtain sync, slow synchro, auto mode, flash OFF mode, red-eye reduction |
| Red-Eye Reduction | - | Yes |
| Features | - | AF illuminator, flash +/- compensation, wireless off-camera control, flash exposure bracketing |
| External Flash Name | - | Olympus FL-LM3 |
| VIDEOGRAPHY / CAMCORDER | Pentax 645Z | Olympus OM-D E-M5 Mark III |
|---|
| Digital Video Format | MJPEG, H.264 | H.264, MOV |
|---|---|---|
| Image Recording Format | JPEG, RAW, RAW + JPEG | JPEG, RAW, RAW + JPEG, MPO |
| Max Video Resolution | 1920 x 1080 | 4096 x 2160 |
| Audio Signal Format | - | Linear PCM |
| Microphone Operation Mode | - | Stereo |
| Microphone Features | - | Wind noise reduction, sensitivity control |
| MEMORY | Pentax 645Z | Olympus OM-D E-M5 Mark III |
|---|
| Memory Card Slot | Dual SD card | SD card |
|---|---|---|
| Supported Memory Cards | SD Memory Card, SDXC Memory Card, SDHC Memory Card, SDHC UHS-I Memory Card, SDXC UHS-I Memory Card | SD Memory Card, SDXC Memory Card, SDHC Memory Card, SDHC UHS-I Memory Card, SDXC UHS-I Memory Card |
| Memory Card Included | No | No |
| Image Storage | - | RAW 5184 x 3888 JPEG 5184 x 3888 JPEG 1024 x 768 |
| Video Capture | - | MOV - 1920 x 1080 p - 30 fps MOV - 1920 x 1080 p - 25 fps MOV - 1920 x 1080 p - 24 fps MOV - 1920 x 1080 p - 60 fps MOV - 1920 x 1080 p - 50 fps MOV - 1280 x 720 p - 60 fps MOV - 1280 x 720 p - 50 fps MOV - 1280 x 720 p - 30 fps MOV - 1280 x 720 p - 25 fps MOV - 1280 x 720 p - 24 fps MOV - 4096 x 2160 p - 30 fps MOV - 3840 x 2160 p - 30 fps MOV - 3840 x 2160 p - 25 fps MOV - 3840 x 2160 p - 24 fps |
| BATTERY AND CHARGING | Pentax 645Z | Olympus OM-D E-M5 Mark III |
|---|
| Battery Type | Pentax D-Li90 Lithium Ion | Olympus BLS-50 Lithium Ion |
|---|---|---|
| Details | Pentax D-Li90 Li-ion rechargeable battery (included) | Olympus BLS-50 Li-ion rechargeable battery (included) |
| Battery Life | Photo shooting - 650 shots Playback - 6.67 hours |
Photo shooting - 310 shots |
| CONNECTIONS | Pentax 645Z | Olympus OM-D E-M5 Mark III |
|---|
| Interface | HDMI, USB 3.0 | HDMI, USB 2.0, IEEE 802.11a/b/g/n, Bluetooth 4.2 |
|---|---|---|
| Connectivity Features | - | Remote control via mobile devices, remote live view |
| Print Standard | - | Exif Print support |
| Flash Terminal | Hot shoe | Hot shoe |
| Connector Type | USB 3.0 (24 pin Micro-USB-C) HDMI output (19 pin micro HDMI Type D) Microphone (mini-phone stereo 3.5 mm) DC power input |
USB 2.0 (5 pin Micro-USB Type B) HDMI output (19 pin micro HDMI Type D) Microphone (mini-phone stereo 3.5 mm) Remote control (sub-mini phone 2.5 mm) |
| FEATURES | Pentax 645Z | Olympus OM-D E-M5 Mark III |
|---|
| Self-Timer Delay | 2sec, 12sec | 2sec, 12sec |
|---|---|---|
| Continuous Shooting Speed | 3 frames per second, 4.5 frames per second | 10 frames per second, 30 frames per second, 6 frames per second |
| Additional Features | RGB primary colour filter, interval shooting mode, peripheral illumination correction, Eye-Fi Card Ready, NR Slow Shutter, High ISO NR, Lateral Chromatic Aberration Correction, distortion correction function, anti-aliasing filter simulator, diffraction correction | Auto power save, AE lock, AF lock, interval shooting mode, USB charging, high-speed recording, Touch Shutter technology, Focus Stacking, 50-megapixel High Resolution mode |
| OTHERS | Pentax 645Z | Olympus OM-D E-M5 Mark III |
|---|
| Included Accessories | Carrying strap, battery charger, body cap, eyecup, shoe cap | Battery charger, body cap, shoulder strap, USB cable |
|---|---|---|
| Software | Drivers & Utilities | - |
| Max Operating Temperature | - | 40 °C |
| Min Operating Temperature | - | -10 °C |
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