Fujifilm X Series X-T3 vs. Pentax K-3 Mark III

Camera Comparison, Reviews and Tests

Side by side comparison and review of Fujifilm X Series X-T3 and Pentax K-3 Mark III. Compare design, sensors, zoom functions, batteries and other key specifications and features to simplify the choice of your perfect digital camera. Our goal is to make it easier for you to decide on the camera that will best meet your expectations by revealing the main differences between the products.

Camera Specifications Comparison

Fujifilm X Series X-T3 vs. Pentax K-3 Mark III Comparison Chart
DESIGN AND DIMENSIONS Fujifilm X Series X-T3 Pentax K-3 Mark III
Product Type Digital camera - 4K - mirrorless system Digital camera - 4K - SLR with Live View mode, movie recording
Lens Included Body only Body only
Height 9.28 cm 10.35 cm
Width 13.25 cm 13.45 cm
Depth 5.88 cm 7.35 cm
Weight 489 g 735 g
Weight Details Camera body only: 489 g
Camera with battery and memory card: 539 g
Camera body only: 735 g
Camera with battery and memory card: 820 g
Body Material Magnesium alloy Magnesium alloy
Enclosure Colour Black | Silver Black | Silver
Protection Weatherproof, freezeproof, dust-resistant Weatherproof, dust-resistant
Navigation - GPS receiver
SENSOR Fujifilm X Series X-T3 Pentax K-3 Mark III
Sensor Resolution 26.1 Megapixel 25.73 Megapixel
Optical Sensor Type X-Trans CMOS 4 CMOS
Total Pixels - 26,780,000 pixels
Effective Sensor Resolution 26,100,000 pixels 25,730,000 pixels
Optical Sensor Size APS-C (23.5 x 15.6 mm) APS-C (23.3 x 15.5 mm)
Frame Rate (Max Resolution) 60 fps 30 fps
Sensor Dust Reduction Yes -
Sensor Features Dust Reduction (image sensor vibration) Dust Reduction (image sensor vibration), anti-aliasing simulator function
Image Stabiliser - Optical SR II (5-axis image sensor shift mechanism)
Built-in Optical Image Stabiliser - Yes
Sensors - Digital level metre
PROCESSOR Fujifilm X Series X-T3 Pentax K-3 Mark III
Image Processor X-Processor 4 -
LENS Fujifilm X Series X-T3 Pentax K-3 Mark III
Lens Mounting Type Fujifilm X Mount Pentax K
FOCUSING Fujifilm X Series X-T3 Pentax K-3 Mark III
Auto Focus TTL contrast and phase detection TTL contrast and phase detection
Auto Focus Points (Zones) Qty 91 101
AE/AF Control Face-priority AF, Subject-tracking AF, Eye detection AF, Zone AF Auto-area AF, Zone AF, Expanded area AF
Face Detection Eye Detect AF, Face Detection AF/AE Yes
VIEWFINDER Fujifilm X Series X-T3 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 0.75x 1.05x
Optical Viewfinder Dioptric Correction Range -4 to +2 -4 to +1
Features Auto eye sensor Auto eye sensor
EXPOSURE & WHITE BALANCE Fujifilm X Series X-T3 Pentax K-3 Mark III
ISO (Max) 51200 1600000
Native ISO 160-12800 -
Extended ISO (Max) 25600 (H1), 51200 (H2) -
Extended ISO (Min) 80 (L1), 105 (L2), 125 (L3) -
Light Sensitivity ISO 100, ISO 125, ISO 80, ISO auto, ISO 51200, ISO 25600, ISO 160-12800 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 Bulb, 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 Soft focus, miniature, Film Simulation, partial colour, Toy camera, High Key, Low Key, Pop Colour, Dynamic tone 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 Fine, incandescent, shade, fluorescent light (cool white), fluorescent light (daylight), fluorescent light (warm white), Underwater, 2500K - 10000K 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 1/32000 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
White Balance Bracketing Yes -
X-sync Speed 1/250sec 1/200sec
Exposure Range - EV -3-20 (ISO 100)
DISPLAY Fujifilm X Series X-T3 Pentax K-3 Mark III
Type 3" LCD display 3.2" LCD display
Touch Screen Yes Yes
Display Format 1,040,000 pixels 1,620,000 pixels
Display Form Factor Tilting (3-way) Built-in
Display Features Display brightness control, display colour control Colour control, contrast control, display brightness control, night vision LCD display
FLASH Fujifilm X Series X-T3 Pentax K-3 Mark III
Camera Flash Detachable flash -
Guide Number (m / ISO 100) 8 -
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 -
External Flash Name Fujifilm EF-X8 -
VIDEOGRAPHY / CAMCORDER Fujifilm X Series X-T3 Pentax K-3 Mark III
Digital Video Format H.264, MOV, 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 Stereo
Microphone Features - Wind noise reduction, sensitivity control
MEMORY Fujifilm X Series X-T3 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 512 GB -
Image Storage 6240 x 4160
6240 x 3512
4160 x 4160
4416 x 2944
4416 x 2488
2944 x 2944
3120 x 2080
3120 x 1760
2080 x 2080
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 - 59.94 fps - 400Mbps
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 X Series X-T3 Pentax K-3 Mark III
Battery Type Fujifilm NP-W126S Lithium Ion Pentax D-Li90 Lithium Ion
Details Fujifilm NP-W126S Li-ion rechargeable battery (included) Pentax D-Li90 Li-ion rechargeable battery (included)
Battery Life Photo shooting - 390 shots
Video recording - 55 minutes (4K resolution)
Video recording - 75 minutes (Full HD resolution)
Photo shooting - 800 shots
Playback - 250 minutes
CONNECTIONS Fujifilm X Series X-T3 Pentax K-3 Mark III
Interface HDMI, USB 3.1, 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
Tripod Mount Connection Point Yes -
Flash Terminal Hot shoe Hot shoe, PC terminal
Connector Type USB 3.1 Gen 1 (USB Type-C)
HDMI output (19 pin micro HDMI Type D)
Microphone (mini-phone 3.5mm)
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 X Series X-T3 Pentax K-3 Mark III
Self-Timer Delay 10 sec, 2sec 2sec, 12sec
Continuous Shooting Speed 8 frames per second, 5.7 frames per second, 20 frames per second, 10 frames per second, 30 frames per second, 11 frames per second 2.5 frames per second, 12 frames per second, 7 frames per second
HDR Mode - Auto HDR mode
Additional Features AE lock, AF lock, Dynamic Range Adjustment, primary colour filter 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 X Series X-T3 Pentax K-3 Mark III
Included Accessories Body cap, shoulder strap, shoe cap, protective cover, strap clip, battery grip terminal cover, sync terminal cover, clip attaching tool 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 Limited warranty - 1 year
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