In depth comparison and review of Fujifilm GFX 100S and Pentax K-3 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 | Fujifilm GFX 100S | Pentax K-3 Mark III |
|---|
| Product Type | Digital camera - 4K - mirrorless system with movie recording | Digital camera - 4K - SLR with Live View mode, movie recording |
|---|---|---|
| Lens Included | Body only | Body only |
| Height | 10.42 cm | 10.35 cm |
| Width | 15 cm | 13.45 cm |
| Depth | 8.72 cm | 7.35 cm |
| Weight | 821 g | 735 g |
| Weight Details | Camera body only: 821 g Camera with battery and memory card: 900 g |
Camera body only: 735 g Camera with battery and memory card: 820 g |
| Body Material | Magnesium alloy | Magnesium alloy |
| Enclosure Colour | Black | Black | Silver |
| Protection | Weatherproof, freezeproof, dust-resistant | Weatherproof, dust-resistant |
| Navigation | - | GPS receiver |
| SENSOR | Fujifilm GFX 100S | Pentax K-3 Mark III |
|---|
| Sensor Resolution | 102 Megapixel | 25.73 Megapixel |
|---|---|---|
| Optical Sensor Type | CMOS | CMOS |
| Total Pixels | - | 26,780,000 pixels |
| Effective Sensor Resolution | 102,000,000 pixels | 25,730,000 pixels |
| Optical Sensor Size | Medium Format (43.8 x 32.9 mm) | APS-C (23.3 x 15.5 mm) |
| Frame Rate (Max Resolution) | 30 fps | 30 fps |
| Sensor Dust Reduction | Yes | - |
| Sensor Features | Ultrasonic vibration | Dust Reduction (image sensor vibration), anti-aliasing simulator function |
| Image Stabiliser | Optical (5-axis image sensor shift mechanism) | Optical SR II (5-axis image sensor shift mechanism) |
| Built-in Optical Image Stabiliser | - | Yes |
| Sensors | - | Digital level metre |
| PROCESSOR | Fujifilm GFX 100S | Pentax K-3 Mark III |
|---|
| Image Processor | X-Processor 4 | - |
|---|
| LENS | Fujifilm GFX 100S | Pentax K-3 Mark III |
|---|
| Lens Mounting Type | Fujifilm G Mount | Pentax K |
|---|
| FOCUSING | Fujifilm GFX 100S | Pentax K-3 Mark III |
|---|
| Auto Focus | TTL contrast and phase detection | TTL contrast and phase detection |
|---|---|---|
| Auto Focus Points (Zones) Qty | - | 101 |
| AE/AF Control | Subject-tracking AF, Eye detection AF, Zone AF | Auto-area AF, Zone AF, Expanded area AF |
| Face Detection | Eye Detect AF, face-priority AF function | Yes |
| VIEWFINDER | Fujifilm GFX 100S | Pentax K-3 Mark III |
|---|
| Viewfinder Type | Electronic - OLED | Optical - fixed eye-level pentaprism |
|---|---|---|
| Viewfinder Colour Support | Colour | - |
| Viewfinder Diagonal Size | 0.5" | - |
| Viewfinder Resolution | 3,690,000 pixels | - |
| Optical Viewfinder Field Coverage | 100% | 100% |
| Optical Viewfinder Magnification | 0.77x | 1.05x |
| Optical Viewfinder Dioptric Correction Range | -4 to +2 | -4 to +1 |
| Features | Viewfinder brightness control, auto eye sensor | Auto eye sensor |
| EXPOSURE & WHITE BALANCE | Fujifilm GFX 100S | Pentax K-3 Mark III |
|---|
| ISO (Max) | 102400 | 1600000 |
|---|---|---|
| Extended ISO (Max) | 25600 (H1), 51200 (H2), 102400 (H3) | - |
| Extended ISO (Min) | 50 | - |
| Light Sensitivity | ISO 50, ISO auto, ISO 102400, ISO 51200, ISO 25600, ISO 100-12800 | ISO auto, ISO 100-1600000 |
| Exposure Metering | Multi-segment, centre-weighted, spot, average | Multi-segment, centre-weighted, spot, highlight-weighted |
| Exposure Metering Zones | 256 | - |
| Exposure Modes | Automatic, manual, aperture-priority, shutter-priority | Programme, bulb, automatic, manual, aperture-priority, shutter-priority, ISO priority, shutter & aperture priority |
| Bracketing Modes | Dynamic Range Bracketing, Film Simulation Bracketing, focus bracketing, ISO sensitivity bracketing, white balance bracketing | Depth of field bracketing, motion bracketing |
| Special Effects | Chrome, Film Simulation, Grainy Film | Soft, Slim, fisheye, natural, bright, Vibrant, monochrome, Muted, Flat, landscape, portrait, miniature, Cross Process, Retro, Colour Extract, Toy camera, High contrast, Colour Invert, Bleach Bypass, Radiant, Reversal Film, Shading, Tone Expansion, Bold Monochrome, Unicolour Bold, Colour replace, Grainy Monochrome |
| White Balance | Custom, automatic, presets | Custom, automatic, presets |
| White Balance Presets | Incandescent, fluorescent, daylight, shade, fluorescent light (cool white), fluorescent light (warm white), Underwater | Cloudy, tungsten light, daylight, shade, fluorescent light (cool white), fluorescent light (daylight), fluorescent light (warm white), Color Temperature Enhancement (CTE), fluorescent light (daylight white) |
| Shutter Type | Mechanical, electronic | Electronic, mechanical electronically-controlled |
| Max Shutter Speed | 1/16000 sec | 1/8000 sec |
| Min Shutter Speed | 30 sec | 30 sec |
| Exposure Compensation | ±5 EV range, in 1/3 EV steps | ±5 EV range, in 1/2 or 1/3 EV steps |
| Auto Exposure Bracketing | 2, 3, 5, 7, 9 steps in 1/3 - 3 EV steps | - |
| White Balance Bracketing | Yes | - |
| X-sync Speed | 1/125sec | 1/200sec |
| Exposure Range | - | EV -3-20 (ISO 100) |
| DISPLAY | Fujifilm GFX 100S | Pentax K-3 Mark III |
|---|
| Type | 3.2" LCD display | 3.2" LCD display |
|---|---|---|
| Touch Screen | Yes | Yes |
| Display Format | 2,360,000 pixels | 1,620,000 pixels |
| Display Form Factor | Folding | Built-in |
| Display Features | Display brightness control, display colour control | Colour control, contrast control, display brightness control, night vision LCD display |
| VIDEOGRAPHY / CAMCORDER | Fujifilm GFX 100S | Pentax K-3 Mark III |
|---|
| Digital Video Format | H.264, HEVC, H.265 | H.264, MOV |
|---|---|---|
| Image Recording Format | JPEG, RAW, RAW + JPEG | JPEG, DNG (RAW), PEF (RAW) |
| Max Video Resolution | 4096 x 2160 | 3840 x 2160 |
| Microphone Operation Mode | - | Stereo |
| Microphone Features | - | Wind noise reduction, sensitivity control |
| MEMORY | Fujifilm GFX 100S | Pentax K-3 Mark III |
|---|
| Memory Card Slot | SD card | Dual SD card |
|---|---|---|
| Supported Memory Cards | SD Memory Card, SDXC Memory Card, SDHC Memory Card, SDHC UHS-I Memory Card, SDXC UHS-I Memory Card, SDHC UHS-II Memory Card, SDXC UHS-II Memory Card | SD Memory Card, SDXC Memory Card, SDHC Memory Card, SDHC UHS-I Memory Card, SDXC UHS-I Memory Card, SDHC UHS-II Memory Card, SDXC UHS-II Memory Card |
| Memory Card Included | No | No |
| Memory Card Max Supported Size | 2 TB | - |
| Image Storage | 11648 x 8736 11648 x 7768 11648 x 6552 8736 x 8736 11648 x 4304 10928 x 8736 10192 x 8736 8256 x 6192 8256 x 5504 8256 x 4640 6192 x 6192 8256 x 3048 7744 x 6192 7232 x 6192 4000 x 3000 4000 x 2664 4000 x 2248 2992 x 2992 4000 x 1480 3744 x 3000 3504 x 3000 |
RAW 6192 x 4128 JPEG 6192 x 4128 JPEG 4752 x 3168 JPEG 3648 x 2432 JPEG 1920 x 1280 |
| Video Capture | 4096 x 2160 p 3840 x 2160 p 2048 x 1080 p 1920 x 1080 p |
H.264 - 3840 x 2160 p - 30 fps H.264 - 3840 x 2160 p - 24 fps H.264 - 1920 x 1080 p - 60 fps H.264 - 1920 x 1080 p - 30 fps H.264 - 1920 x 1080 p - 24 fps |
| BATTERY AND CHARGING | Fujifilm GFX 100S | Pentax K-3 Mark III |
|---|
| Battery Type | Fujifilm NP-W235 Lithium Ion | Pentax D-Li90 Lithium Ion |
|---|---|---|
| Details | Fujifilm NP-W235 Li-ion rechargeable battery (included) | Pentax D-Li90 Li-ion rechargeable battery (included) |
| Battery Life | Photo shooting - 460 shots Video recording - 95 minutes (4K resolution) |
Photo shooting - 800 shots Playback - 250 minutes |
| CONNECTIONS | Fujifilm GFX 100S | Pentax K-3 Mark III |
|---|
| Interface | HDMI, USB-C, IEEE 802.11b/g/n, Bluetooth 4.2 | HDMI, USB-C, IEEE 802.11b/g/n, Bluetooth 4.2 |
|---|---|---|
| Connectivity Features | Remote control via mobile devices, Wireless Image Transfer | Remote control via mobile devices, remote live view, Wireless Image Transfer |
| Print Standard | Exif Print support | Exif Print support |
| Computer Connectivity | - | Mac, Windows |
| Flash Terminal | Hot shoe | Hot shoe, PC terminal |
| Connector Type | USB 3.2 Gen 1 (USB Type-C) HDMI output (19 pin micro HDMI Type D) Microphone (mini-phone stereo 3.5 mm) Headphones (mini-phone stereo 3.5 mm) Remote control (sub-mini phone 2.5 mm) |
USB 3.2 Gen 1 (USB Type-C) HDMI output (19 pin micro HDMI Type D) Microphone (mini-phone stereo 3.5 mm) Headphones (mini-phone stereo 3.5 mm) Remote control (sub-mini phone 2.5 mm) |
| FEATURES | Fujifilm GFX 100S | Pentax K-3 Mark III |
|---|
| Self-Timer Delay | 10 sec, 2sec | 2sec, 12sec |
|---|---|---|
| Continuous Shooting Speed | 2 frames per second, 5 frames per second, 2.9 frames per second | 2.5 frames per second, 12 frames per second, 7 frames per second |
| HDR Mode | - | Auto HDR mode |
| Additional Features | Auto power save, date/time stamp, histogram display, interval shooting mode, in-camera RAW processing | Audio recording, date/time stamp, digital image rotation, camera orientation detection, histogram display, AE lock, AF lock, cropping an image, resizing an image, interval shooting mode, in-camera film editing, in-camera RAW processing, peripheral illumination correction, horizon correction, NR Slow Shutter, High ISO NR, Lens Distortion Correction, primary colour filter, Automatic composition correction function, colour moire correction, Lateral Chromatic Aberration Correction, diffraction correction, Pixel Shift Resolution technology, colour fringe correction, multiple exposure capture, GPS stamp, D-range correction |
| OTHERS | Fujifilm GFX 100S | Pentax K-3 Mark III |
|---|
| Included Accessories | Body cap, shoulder strap, AC power adaptor, USB cable, power plug adapter, cable protector, hot shoe cover | Eyepiece cover, carrying strap, battery charger, body cap, USB cable, eyecup, shoe cap, sync terminal cover |
|---|---|---|
| Software | - | Digital Camera Utility 5 |
| Max Operating Temperature | 40 °C | 40 °C |
| Min Operating Temperature | -10 °C | -10 °C |
| Service & Support | - | Limited warranty - 1 year |
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