• APS-C 369.7mm2
  • 12.4 megapixels
  • ISO 200 - 6400
  • 35mm 860.4mm2
  • 16.2 megapixels
  • ISO 100 - 25,600
  • Detailed specifications
  • Pentax K-x
  • Nikon D4S
Links
Prices:   Compare Prices
Manufacturer URL: Manufacturer website Manufacturer website
Predecessor: Pentax K2000
K2000 vs K-x
Nikon D4
D4 vs D4S
Successor: Pentax K-r
K-x vs K-r
Nikon D5
D4S vs D5
General
Model Number: K-x D4S
Alternate Model Number(s):    
Camera Format: SLR Pro SLR
Currently Manufactured: No No
Retail Price: $649.95 $6499.95
Street Price: $701.76 $5,399.48
Date Available: 2009-10-15 2014-03-06
Tripod Mount: Yes Yes
Weight: 27.9 oz (791 g)
includes batteries, kit lens
47.8 oz (1,356 g)
includes batteries
Size: 4.8 x 3.6 x 2.7 in.
(122 x 92 x 69 mm)
6.3 x 6.2 x 3.6 in.
(160 x 157 x 91 mm)
Waterproof: No No
Waterproof Depth: n/a n/a
Image Sensor
Sensor Type: CMOS CMOS
Sensor Manufacturer:    
Effective Megapixels: 12.4 16.2
Sensor Format: APS-C 35mm
Sensor size: 369.72mm2 (23.7mm x 15.6mm) 860.4mm2 (36.00mm x 23.90mm)
Approximate Pixel Pitch: 5.53 microns 7.31 microns
Focal Length Multiplier: 1.5x 1.0x
Aspect Ratio: 3:2 3:2
Color Filter Type: RGBG RGBG
Anti Aliasing Filter: Fixed Fixed
Self-Cleaning: Yes Yes
Sensor shift image stabilization: Yes No
On-Sensor Phase Detect: No No
DxO Sensor Score: 72 89
DxO Color Depth Score (bits): 22.8 24.4
DxO Dynamic Range Score (evs): 12.5 13.3
DxO Maximum Effective ISO Score (iso): 811 3,074
Image Capture
Image Resolution: 4288 x 2848 (12.2 MP, Other),
3936 x 2624 (10.3 MP, 3:2),
3072 x 2048 (6.3 MP, 3:2),
1728 x 1152 (2.0 MP, 3:2)
4928 x 3280 (16.2 MP, 3:2),
3696 x 2456 (9.1 MP, 3:2),
2464 x 1640 (4.0 MP, 3:2),
4096 x 2720 (11.1 MP, Other),
3072 x 2040 (6.3 MP, Other),
2048 x 1360 (2.8 MP, Other),
3200 x 2128 (6.8 MP, 3:2),
2400 x 1592 (3.8 MP, Other),
1600 x 1064 (1.7 MP, 3:2),
4096 x 3280 (13.4 MP, 5:4),
3072 x 2456 (7.5 MP, 5:4),
2048 x 1640 (3.4 MP, 5:4)
Image File Format: JPEG (EXIF 2.21), 12-bit RAW (.PEF, .DNG) JPEG, NEF (RAW): 12 or 14 bit, lossless compressed, compressed, or uncompressed, small size availble (12-bit uncompressed only); TIFF (RGB)
Continuous-mode frames/second: 4.3 10.6
Video Capture
Can take movies: Yes Yes
Movie Resolution: 1280x720 (24)
640x416 (24)
1920x1080 (60p/​50p/​30p/​25p/​24p)
1280x720 (60p/​50p)
640x424 (30p/​25p)
Movie File Format:   MOV (Video: H.264/MPEG-4 AVC; Audio: Linear PCM)
Composite Video Out: Yes No
NTSC/PAL Switchable Video: Yes n/a
Video Usable as Viewfinder: No n/a
HD Video Out: No Yes
HD Video Connection: HDMI
Lens & Optics
Lens Mount: Pentax K (KA/KAF/KAF2/3) Nikon F
Lens: smc Pentax DA L 18-55mm f/3.5-5.6 AL n/a
Focal Length (35mm equivalent): 27 - 84mm  
Focal Length (actual): 18 - 55mm  
Zoom Ratio: 3.00x  
Aperture Range: f/3.5 - 22 (W), f/5.6 - 38 (T)  
Integrated ND Filter: No No
Normal Focus Range:    
Macro Focus Range:    
Filter Thread: 52.0mm n/a
Thread Type: n/a n/a
Optical Image Stabilization: No No
Digital Zoom: No
Digital Zoom Values: n/a  
Auto Focus
Auto Focus: Yes Yes
Auto Focus Type: SAFOX VIII TTL phase-detect 11 point (9 cross) AF: 11 pt auto, 5 pt auto, AF pt select, center/spot Nikon Advanced Multi-CAM 3500FX autofocus sensor module with TTL phase detection, fine-tuning, and 51 focus points (including 15 cross-type sensors with f/8 supported by 11 sensors)
Auto Focus Assist Light? Yes No
Manual Focus: Yes Yes
Viewfinder
Viewfinder: Optical / LCD Optical / LCD
Viewfinder Type: SLR type; fixed eye-level pentamirror, 96% coverage, 0.85x mag., -2.5 to +1.5 diopter SLR; eye-level pentaprism, 100% coverage, 0.7x magnification, 18mm eyepoint, -3 to +1 diopter
Focus Peaking: No No
EVF Resolution: n/a n/a
Viewfinder Magnification (35mm equivalent): 0.57x 0.70x
Viewfinder Magnification (nominal/claimed): 0.85x 0.70x
Display
Eye-level Viewfinder: Yes Yes
Rear Display: Yes Yes
Rear Display Size (inches): 2.7 3.2
Rear Display Resolution: 230,000 dots 921,600 dots (307,200 px)
Touchscreen: No No
Articulating Screen: No No
Tilt Swivel Screen: No No
Selfie Screen: No No
Max Playback Zoom: 16.0x 46.0x
Top Deck Display: No Yes
Exposure
Maximum ISO (native): 6400 25600
Minimum ISO (native): 200 100
ISO Settings: Auto (200-6400), 100, 200, 400, 800, 1600, 3200, 6400; expandable to 12800 Auto, 100 - 25,600, plus down to 50 in Lo-1, up to 409,600 in Hi-4
Auto ISO Mode: Yes Yes
White Balance Settings: Auto, Daylight, Shade, Cloudy, Tungsten, Fluorescent (D, N, W, L), Flash, Custom Auto (2 types), incandescent, fluorescent (7 types), direct sunlight, flash, cloudy, shade, preset manual (up to 6 values can be stored, spot white balance measurement available during live view), color temperature (2500 K-10000 K)
Shutter Speed Range: 1/6000 - 30 sec 1/8000 - 30 sec
Bulb Mode: Yes Yes
Exposure Compensation: +/- 2.0EV in 0.3EV steps +/- 5.0EV in 0.3EV steps
Metering Modes: 16-segment Multi, Center-weighted, Spot 91K-pixel 3D Color Matrix Metering III, Center-weighted (75% given to 8, 12, 15 or 20mm circle), Spot (4mm) centered on selected focus area
Program Auto Exposure: Yes Yes
Aperture Priority: Yes Yes
Shutter Priority: Yes Yes
Full Manual Exposure: Yes Yes
Creative Exposure Modes: Auto Picture (Portrait, Landscape, Macro, Action, Night Scene Portrait, Picture (Portrait, Landscape, Macro, Action, Night Scene Portrait, Standard Flash Off), Scene (Night Scene, Surf & Snow, Food, Sunset, Kids, Pet, Candlelight, Museum, Stage Lighting [JPG], Night Snap [JPG]), Sensitivity Priority None
Self Timer: 2 or 12 seconds 2/5/10/20s; 1-9 exposures at intervals of 0.5, 1, 2, or 3 seconds
Time Lapse (intervalometer):   Yes
High Resolution Composite: No No
Flash
Built-in Flash: Yes No
Flash Modes: On, off, redeye, slow sync, slow sync w redeye, slow sync w trailing curtain, wireless Front curtain sync, slow sync, rear-curtain sync, red-eye reduction, red-eye reduction with slow sync, slow rear-curtain sync, Auto FP High-Speed Sync supported
Flash Guide Number (ISO 100): 11.3 m / 37.1 ft. n/a
Flash Range Description: Depends on lens n/a
Max Flash Sync: 1/180 1/250
Flash Exposure Compensation: -2 to +1 EV in 0.5EV steps -3 to +1 EV in 0.3EV steps
External Flash Connection: Hot Shoe ISO 518 Hot Shoe; safety lock provided; PC Sync terminal
Built-In Wireless Flash Control: Full TTL exposure  
Image Storage
Usable Memory Types: SD / SDHC CF1 / XQD
UHS Support:    
Other Memory:   UDMA7 compliant
Dual Card Slots: No Yes
RAW Capture Support: Yes Yes
Uncompressed Format: 12-bit RAW (.PEF, .DNG) NEF (RAW): 12 or 14 bit, lossless compressed, compressed, or uncompressed, small size availble (12-bit uncompressed only); TIFF (RGB)
Movie File Format:   MOV (Video: H.264/MPEG-4 AVC; Audio: Linear PCM)
Included Memory: No memory included No memory included
Included Memory Type:    
Connectivity
Built-In Wi-Fi: No No
NFC: No No
Bluetooth: No No
Built-In GPS: No No
Microphone Jack: No Yes
Headphone Jack: No Yes
External Connections: USB 2.0 High Speed USB 2.0 High Speed,Ethernet
PictBridge Compliant: No Yes
DPOF Compliant: Yes Yes
Remote Control: Yes Yes
Remote Control Type: Optional IR Optional wired, wireless
Connections (extended): AC adapter available Type-C mini HDMI with uncompressed video support, DC Input, 10-pin Expansion Terminal, Audio input (stereo 3.5mm jack with power), Audio output (stereo 3.5mm jack), Peripheral connector for WT-5A/WT-4A
Performance Timing
Cycle time for JPEG shooting in single shot mode (seconds per frame, max resolution): 0.39 <0.3
Cycle time for RAW shooting in single shot mode (seconds per frame): 0.43 0.36
Buffer size for RAW shooting in single shot mode (frames): 10 Unlimited
Cycle time for RAW+JPEG shooting in single shot mode (seconds per shot):   0.33
Camera penalizes early shutter press? No No
JPEG shooting speed in burst mode (fps, max resolution): 4.3 10.6
Buffer size for JPEG shooting in burst mode (frames, max resolution): 25 200
RAW shooting speed in burst mode (fps):   10.8
Buffer size for RAW shooting in burst mode (frames):   78
RAW+JPEG shooting speed in burst mode (fps):   10.8
Buffer Size for RAW+JPEG shooting in burst mode (frames):   43
Shutter lag (full AF, wide/mid): 0.10 seconds 0.20 seconds
Shutter lag (full AF, tele):    
Shutter lag (full AF, live view - DSLR):   0.91 seconds
Shutter lag (prefocused, live view - DSLR):   0.239 seconds
Shutter Lag (manual focus): 0.082 seconds 0.044 seconds
Shutter lag (full AF, with flash): 0.23 seconds  
Shutter Lag (prefocused): 0.082 seconds 0.043 seconds
Shutter Lag (notes): Live View: Phase-detect Full AF: 0.448s Contrast-detect Full AF: 2.567s Prefocused: 0.427s OVF: Full AF lag, wide-area mode = 0.288s Live View: Full AF lag = 0.914s Prefocused = 0.239s
Startup Time: 0.6 seconds 0.2 seconds
Play -> Record Time: 0.2 seconds 0.2 seconds
Flash cycle time, full power: 3.3 seconds  
Power
Battery Life, Stills (CIPA Rating Monitor/Live View):    
Battery Life, Still (CIPA Rating OVF/EVF): 420 shots (NiMH AA) 3020 shots
Battery Life, Video:    
Battery Form Factor: 4 x AA Proprietary EN-EL18A
Usable Battery Types: Lithium, Alkaline disposables; NiMH rechargeables Lithium-ion rechargeable
Batteries Included: 4 x AA Alkaline disposables 1 x Proprietary EN-EL18A Lithium-ion rechargeable
Battery Charger Included (dedicated charger or AC/USB adapter): No Yes
Dedicated Battery Charger Included: Yes
Internal Charging Supported: No
Software
Included Software: CD-ROM Nikon ViewNX 2 CD-ROM
OS Compatibility: Windows XP/Vista/7, MacOS-X 10.3+ Windows, Mac OS X
Miscellaneous
Notes & Features: Sensor-shift shake reduction, 720p HD video capture, Live View with face detection. Available in black or white. Limited edition colors of red and navy will become available at select locations to be announced. New 16MP sensor with improved high ISO performance, EXPEED 4 processor, 11fps burst mode with AE/AF, improved AF, up to 1920x1080p60 video, new small RAW size option (2464 x 1640, 12-bit), improved battery life, built-in GbE LAN (1000Base-T), uncompressed 1080p60 HDMI output.