• APS-C 366.6mm2
  • 20.1 megapixels
  • ISO 100 - 51,200
  • APS-C 366.6mm2
  • 26.1 megapixels
  • ISO 160 - 12,800
  • Detailed specifications
  • Pentax K-S1
  • Fujifilm X-T3
Links
Prices: Compare Prices Compare Prices
Manufacturer URL: Manufacturer website Manufacturer website
Predecessor:   Fujifilm X-T2
X-T2 vs X-T3
Successor:   Fujifilm X-T4
X-T3 vs X-T4
General
Model Number: K-S1 X-T3
Alternate Model Number(s):    
Camera Format: SLR Compact System Camera
Currently Manufactured: No Yes
Retail Price: $799.95 $1499.95
Street Price: $501.65 $1,299.00
Date Available: 2014-09-15 2018-07-20
Tripod Mount: Yes Yes
Weight: 27.0 oz (765 g)
includes batteries, kit lens
30.7 oz (869 g)
includes batteries, kit lens
Size: 4.8 x 3.7 x 2.8 in.
(121 x 93 x 70 mm)
5.2 x 3.7 x 2.3 in.
(133 x 93 x 59 mm)
Waterproof: No No
Waterproof Depth: n/a n/a
Image Sensor
Sensor Type: CMOS CMOS
Sensor Manufacturer:    
Effective Megapixels: 20.1 26.1
Sensor Format: APS-C APS-C
Sensor size: 366.6mm2 (23.50mm x 15.60mm) 366.6mm2 (23.50mm x 15.60mm)
Approximate Pixel Pitch: 4.29 microns 3.77 microns
Focal Length Multiplier: 1.5x 1.5x
Aspect Ratio: 3:2 3:2
Color Filter Type: RGBG X-Trans 4
Anti Aliasing Filter: Optional Not needed
Self-Cleaning: Yes Yes
Sensor shift image stabilization: Yes No
On-Sensor Phase Detect: No Yes
DxO Sensor Score: 78  
DxO Color Depth Score (bits): 23.5  
DxO Dynamic Range Score (evs): 13.0  
DxO Maximum Effective ISO Score (iso): 1,061  
Image Capture
Image Resolution: 5472 x 3648 (20.0 MP, 3:2),
4224 x 2816 (11.9 MP, 3:2),
3072 x 2048 (6.3 MP, 3:2),
1920 x 1280 (2.5 MP, 3:2)
6240 x 4160 (26.0 MP, 3:2),
6240 x 3512 (21.9 MP, 16:9),
4160 x 4160 (17.3 MP, 1:1),
4416 x 2944 (13.0 MP, 3:2),
4416 x 2488 (11.0 MP, Other),
2944 x 2944 (8.7 MP, 1:1),
3120 x 2080 (6.5 MP, 3:2),
3120 x 1760 (5.5 MP, Other),
2080 x 2080 (4.3 MP, 1:1)
Image File Format: JPEG (EXIF 2.30), 12-bit RAW (.PEF, .DNG) JPEG (Exif Ver 2.3), .RAF 14-bit RAW, uncompressed or lossless compression; RAW + JPEG
Continuous-mode frames/second: 5.4 20.0
Video Capture
Can take movies: Yes Yes
Movie Resolution: 1920x1080 (30p/​25p/​24p)
1280x720 (60p/​50p)
4096x2160 (60p/​50p/​30p/​25p/​24p/​23.98p)
3840x2160 (60p/​50p/​30p/​25p/​24p/​23.98p)
2048x1080 (60p/​50p/​30p/​25p/​24p/​23.98p)
1920x1080 (60p/​50p/​30p/​25p/​24p/​23.98p)
1920x1080 (120p/​100p)
Movie File Format: MPEG-4 AVC/H.264 (MOV) MOV (MPEG-4 AVC/H.264, HEVC/H.265, Audio: Linear PCM / Stereo sound 24bit / 48KHz sampling)
Composite Video Out: No
NTSC/PAL Switchable Video: n/a n/a
Video Usable as Viewfinder: n/a n/a
HD Video Out: Yes Yes
HD Video Connection: HDMI HDMI
Lens & Optics
Lens Mount: Pentax K (KA/KAF/KAF2) Fujifilm X
Lens: smc Pentax-DA L 18-55mm f/3.5-5.6 AL Fujinon XF 18-55mm f/2.8-4 R LM OIS; 14 elements in 10 groups, including 3 aspherical lenses and 1 extra low dispersion element
Focal Length (35mm equivalent): 27 - 83mm 27 - 84mm
Focal Length (actual): 18 - 55mm 18 - 55mm
Zoom Ratio: 3.06x 3.06x
Aperture Range: f/3.5 - f/22 (wide) / f/5.6 - f/40 (tele) f/2.8 (wide) / f/4 (tele) - f/22; 7 diaphragm blades
Integrated ND Filter: No No
Normal Focus Range: 25 cm to Infinity
9.8 in to Infinity
30 cm to Infinity
11.8 in to Infinity
Macro Focus Range:    
Filter Thread: 52.0mm 58.0mm
Thread Type: n/a n/a
Optical Image Stabilization: No Yes
Digital Zoom:
Digital Zoom Values:    
Auto Focus
Auto Focus: Yes Yes
Auto Focus Type: SAFOX IX i+, TTL phase-matching -11 point (9 cross type focus points in the center) Hybrid Phase/Contrast Detect AF: 425 selectable focus points, 2.16 million phase-detect pixels; Single point AF: EVF / LCD: 13x9 / 25x17 (changeable size of AF frame among 5 types), Zone AF: 3x3 / 5x5 / 7x7 from 91 areas on 13x9 grid, Wide/Tracking AF: Up to 18 area
Auto Focus Assist Light? Yes Yes
Manual Focus: Yes Yes
Viewfinder
Viewfinder: Optical / LCD EVF / LCD
Viewfinder Type: SLR type; eye-level pentaprism, ~100% coverage, 0.95x mag., 20.5mm eyepoint, -2.5 to +1.5 diopter EVF: 0.5-inch 3.69M-dot OLED with 100% coverage, 0.75x magnification (35mm format equivalent), 23mm eyepoint (from the rear end of the camera's eyepiece), -4 to +2 diopter adjustment, eye sensor
Focus Peaking: Yes Yes
EVF Resolution: n/a 3,690,000 dots
Viewfinder Magnification (35mm equivalent): 0.63x 0.75x
Viewfinder Magnification (nominal/claimed): 0.95x  
Display
Eye-level Viewfinder: Yes Yes
Rear Display: Yes Yes
Rear Display Size (inches): 3.0 3.0
Rear Display Resolution: 921,600 dots (307,200 px) 1,040,000 dots
Touchscreen: No Yes
Articulating Screen: No Yes
Tilt Swivel Screen: No No
Selfie Screen: No No
Max Playback Zoom: 16.0x  
Top Deck Display: No No
Exposure
Maximum ISO (native): 51200 12800
Minimum ISO (native): 100 160
ISO Settings: Auto, 100-51200 (1, 1/2 or 1/3 EV steps) AUTO (3) with selectable limits, ISO 160-12800, Extended output sensitivity equivalent to ISO 80, 100, 125, 25600 and 51200
Auto ISO Mode: Yes Yes
White Balance Settings: Auto, Multi Auto, Daylight, Shade, Cloudy, Fluorescent Light (D: Daylight Color, N: Daylight White, W: Cool White, L: Warm White), Tungsten Light, Flash, CTE, Manual, Color Temperature Auto, Fine, Shade, Fluorescent light (Daylight), Fluorescent light (Warm White), Fluorescent light (Cool White), Incandescent light, Underwater, Custom (3), Color Temperature (2,500-10,000K)
Shutter Speed Range: 1/6000 - 30 sec 1/32000 - 900 sec
Bulb Mode: Yes Yes
Exposure Compensation: +/- 5.0EV in 0.3EV steps +/- 5.0EV in 0.3EV steps
Metering Modes: TTL open-aperture: 77 segment Multi, Center-weighted, Spot TTL 256-zones metering; Multi, Spot, Average, Center-weighted
Program Auto Exposure: Yes Yes
Aperture Priority: Yes Yes
Shutter Priority: Yes Yes
Full Manual Exposure: Yes Yes
Creative Exposure Modes: Sensitivity Priority, Shutter & Aperture Priority (Tav); Scene: Portrait, Landscape, Macro, Moving Object, Night Scene Portrait, Sunset, Blue Sky, Forest, Night Scene, Night Scene HDR (JPEG only), Night Snap, Food, Pet, Kids, Surf & Snow, Backlight Silhouette, Candlelight, Stage Lighting, Museum; Effect: Faded Color, Clear Tone, Brilliant Color, Unicolor Bold, Vintage Color, Cross Processing, Warm Fade, Tone Expansion, Bold Monochrome, Infrared Filter, Vibrant Color Enhance; Digital filters (capture): Extract Color, Replace Color, Toy Camera, Retro, High Contrast, Shading, Invert Color, Unicolor Bold, Bold Monochrome; HDR: Auto, HDR1, HDR2, HDR3 Film Simulation: PROVIA/Standard, Velvia/Vivid, ASTIA/Soft, Classic Chrome, PRO Neg.Hi, PRO Neg.Std, Black&White, Black&White+Ye Filter, Black&White+R Filter, Black&White+G Filter, Sepia, ACROS, ACROS+Ye Filter, ACROS+R Filter, ACROS+G Filter, ETERNA/Cinema; Advanced Filter: Toy camera, Miniature, Pop color, High-key, Low-key, Dynamic tone, Soft focus, Partial color (Red, Orange, Yellow, Green, Blue, Purple); Dynamic Range Setting: AUTO (100-400%), 100%, 200%, 400%; Dynamic Range Priority: Off, Auto, Weak, Strong; Panorama
Self Timer: 2 or 12 seconds 2 or 10 seconds
Time Lapse (intervalometer):   Yes
High Resolution Composite: No No
Flash
Built-in Flash: Yes No
Flash Modes: Auto Flash Discharge, Auto Flash + Red-eye Reduction (Auto Picture, Scene) Flash On, Flash On+ Red-eye Reduction, Slow-speed Sync, Trailing Curtain Sync, Manual Flash Discharge (Full-1/128) Red-eye removal OFF: Auto, Forced Flash, Suppressed Flash, Slow Synchro, Rear-curtain Synchro. Red-eye removal ON: Red-eye Reduction Auto, Red-eye Reduction & Forced Flash, Suppressed Flash, Red-eye Reduction & Slow Synchro, Red-eye Reduction & Rear-curtain Synchro.
Flash Guide Number (ISO 100): 10.0 m / 32.8 ft. 8.0 m / 26.2 ft.
Flash Range Description: Depends on lens Bundled EF-X8 flash is rated with a Guide Number of 8m at ISO 100 or 11m at ISO 200
Max Flash Sync: 1/180 1/250
Flash Exposure Compensation: -2 to +1 EV in 0.5EV steps +/- 2.0 EV in 0.3EV steps
External Flash Connection: Hot Shoe Hot Shoe, PC Sync Terminal
Built-In Wireless Flash Control:   Full TTL exposure
Image Storage
Usable Memory Types: SD / SDHC / SDXC SD / SDHC / SDXC
UHS Support: UHS-I UHS-II
Other Memory: UHS-I compliant  
Dual Card Slots: No Yes
RAW Capture Support: Yes Yes
Uncompressed Format: 12-bit RAW (.PEF, .DNG) .RAF 14-bit RAW, uncompressed or lossless compression; RAW + JPEG
Movie File Format: MPEG-4 AVC/H.264 (MOV) MOV (MPEG-4 AVC/H.264, HEVC/H.265, Audio: Linear PCM / Stereo sound 24bit / 48KHz sampling)
Included Memory: No memory included No memory included
Included Memory Type:    
Connectivity
Built-In Wi-Fi: No Yes
NFC: No No
Bluetooth: No Yes
Built-In GPS: No No
Microphone Jack: No Yes
Headphone Jack: No Yes
External Connections: USB 2.0 High Speed USB 3.0 Super Speed,Bluetooth,WiFi
PictBridge Compliant: No No
DPOF Compliant: Yes Yes
Remote Control: Yes Yes
Remote Control Type: Optional IR Threaded cable release, optional wired, Wi-Fi and Bluetooth
Connections (extended): Micro (Type D) HMDI USB Type-C (USB3.1 Gen1), Micro HDMI (Type D), PC-Sync, 3.5mm stereo mic jack, 3.5mm stereo headphone jack, 2.5mm remote jack
Performance Timing
Cycle time for JPEG shooting in single shot mode (seconds per frame, max resolution):   0.39
Cycle time for RAW shooting in single shot mode (seconds per frame):    
Buffer size for RAW shooting in single shot mode (frames):    
Cycle time for RAW+JPEG shooting in single shot mode (seconds per shot):   0.40
Camera penalizes early shutter press? Yes
JPEG shooting speed in burst mode (fps, max resolution): 5.4 20.0
Buffer size for JPEG shooting in burst mode (frames, max resolution): 20 64
RAW shooting speed in burst mode (fps):   20.0
Buffer size for RAW shooting in burst mode (frames):   36
RAW+JPEG shooting speed in burst mode (fps):   20.0
Buffer Size for RAW+JPEG shooting in burst mode (frames):   34
Shutter lag (full AF, wide/mid):   0.06 seconds
Shutter lag (full AF, tele):    
Shutter lag (full AF, live view - DSLR):    
Shutter lag (prefocused, live view - DSLR):    
Shutter Lag (manual focus):   0.060 seconds
Shutter lag (full AF, with flash):   0.16 seconds
Shutter Lag (prefocused):   0.051 seconds
Shutter Lag (notes):   Boost mode enabled.
Startup Time:   1.1 seconds
Play -> Record Time:   1.0 seconds
Flash cycle time, full power:   4.8 seconds
Power
Battery Life, Stills (CIPA Rating Monitor/Live View):   390 shots
Battery Life, Still (CIPA Rating OVF/EVF): 480 shots 370 shots
Battery Life, Video:   40 minutes
Battery Form Factor: Proprietary D-LI109 Proprietary NP-W126S
Usable Battery Types: Lithium-ion rechargeable Lithium-ion rechargeable
Batteries Included: 1 x Proprietary D-LI109 Lithium-ion rechargeable 1 x Proprietary NP-W126S Lithium-ion rechargeable
Battery Charger Included (dedicated charger or AC/USB adapter): Yes Yes
Dedicated Battery Charger Included: Yes
Internal Charging Supported: Yes
Software
Included Software: Digital Camera Utility 5 Software CD-ROM  
OS Compatibility:    
Miscellaneous
Notes & Features: The K-S1 comes in 3 standard colors: black, blue, and white. In addition, two separate color collections are available; The Fabric Collection, containing 4 unique colors such as cotton beige and tweed gray – and the Night Sky Collection, with 5 more elegant colors like Sunset Orange, Dawn Purple, and Midnight Black. Available in black or silver.