• APS-C 369.7mm2
  • 12.4 megapixels
  • ISO 200 - 6400
  • APS-H 518.9mm2
  • 16.1 megapixels
  • ISO 100 - 12,800
  • Detailed specifications
  • Pentax K-x
  • Canon EOS-1D Mark IV
Links
Prices:   Compare Prices
Manufacturer URL: Manufacturer website Manufacturer website
Predecessor: Pentax K2000
K2000 vs K-x
Canon 1D Mark III
1D Mark III vs 1D Mark IV
Successor: Pentax K-r
K-x vs K-r
 
General
Model Number: K-x 1D Mark IV
Alternate Model Number(s):    
Camera Format: SLR Pro SLR
Currently Manufactured: No No
Retail Price: $649.95 $4999.00
Street Price: $701.76 $2,795.00
Date Available: 2009-10-15 2009-12-31
Tripod Mount: Yes Yes
Weight: 27.9 oz (791 g)
includes batteries, kit lens
49.0 oz (1,390 g)
includes batteries
Size: 4.8 x 3.6 x 2.7 in.
(122 x 92 x 69 mm)
6.1 x 6.2 x 3.1 in.
(156 x 157 x 80 mm)
Waterproof: No No
Waterproof Depth: n/a n/a
Image Sensor
Sensor Type: CMOS CMOS
Sensor Manufacturer:   Canon
Effective Megapixels: 12.4 16.1
Sensor Format: APS-C APS-H
Sensor size: 369.72mm2 (23.7mm x 15.6mm) 518.94mm2 (27.90mm x 18.60mm)
Approximate Pixel Pitch: 5.53 microns 5.70 microns
Focal Length Multiplier: 1.5x 1.3x
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 74
DxO Color Depth Score (bits): 22.8 22.8
DxO Dynamic Range Score (evs): 12.5 12.0
DxO Maximum Effective ISO Score (iso): 811 1,320
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)
4896 x 3264 (16.0 MP, 3:2),
4320 x 2880 (12.4 MP, 3:2),
3672 x 2448 (9.0 MP, 3:2),
3552 x 2368 (8.4 MP, 3:2),
2448 x 1632 (4.0 MP, 3:2)
Image File Format: JPEG (EXIF 2.21), 12-bit RAW (.PEF, .DNG) JPEG (EXIF 2.21), 14-bit .CR2 RAW
Continuous-mode frames/second: 4.3 10.0
Video Capture
Can take movies: Yes Yes
Movie Resolution: 1280x720 (24)
640x416 (24)
1920x1080 (29.97)
1920x1080 (25)
1920x1080 (23.976)
1280x720 (59.94)
1280x720 (50)
640x480 (59.94)
640x480 (50)
Movie File Format:   H.264 (.MOV)
Composite Video Out: Yes Yes
NTSC/PAL Switchable Video: Yes Yes
Video Usable as Viewfinder: No
HD Video Out: No Yes
HD Video Connection: HDMI
Lens & Optics
Lens Mount: Pentax K (KA/KAF/KAF2/3) Canon EF
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 No
Digital Zoom Values: n/a 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 45 user selectable points (39 f/2.8 cross-type) phase detection w/ AI Servo II; LV contrast detect
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 Eye-level fixed pentaprism, 0.76x magnification, 20mm eyepoint, -3.0 to +1.0 diopter correction
Focus Peaking: No No
EVF Resolution: n/a n/a
Viewfinder Magnification (35mm equivalent): 0.57x 0.58x
Viewfinder Magnification (nominal/claimed): 0.85x 0.76x
Display
Eye-level Viewfinder: Yes Yes
Rear Display: Yes Yes
Rear Display Size (inches): 2.7 3.0
Rear Display Resolution: 230,000 dots 920,000 dots
Touchscreen: No No
Articulating Screen: No No
Tilt Swivel Screen: No No
Selfie Screen: No No
Max Playback Zoom: 16.0x 10.0x
Top Deck Display: No Yes
Exposure
Maximum ISO (native): 6400 12800
Minimum ISO (native): 200 100
ISO Settings: Auto (200-6400), 100, 200, 400, 800, 1600, 3200, 6400; expandable to 12800 Auto, 100 to 12,800 (standard), 50 to 102,400 (expanded)
Auto ISO Mode: Yes Yes
White Balance Settings: Auto, Daylight, Shade, Cloudy, Tungsten, Fluorescent (D, N, W, L), Flash, Custom Auto, Daylight, Shade, Cloudy, Tungsten, White Fluorescent, Flash, Custom (5 settings from camera), Personal (5 settings from PC), Color Temp
Shutter Speed Range: 1/6000 - 30 sec 1/8000 - 30 sec
Bulb Mode: Yes Yes
Exposure Compensation: +/- 2.0EV in 0.3EV steps +/- 3.0EV in 0.3EV steps
Metering Modes: 16-segment Multi, Center-weighted, Spot 63-zone: AF linked evaluative, 13.5% partial, center-weighted average, 3.8% center / AF / multi spot
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  
Self Timer: 2 or 12 seconds 2 or 10 seconds
Time Lapse (intervalometer):    
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 E-TTL II / evaluative / averaged; x-sync at 1/250 (1/300 w/ Canon Speedlite)
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  
Flash Exposure Compensation: -2 to +1 EV in 0.5EV steps +/- 3.0 EV in 0.3EV steps
External Flash Connection: Hot Shoe Hot shoe, PC sync
Built-In Wireless Flash Control: Full TTL exposure  
Image Storage
Usable Memory Types: SD / SDHC CF1 / CF2 / SD / SDHC
UHS Support:    
Other Memory:    
Dual Card Slots: No Yes
RAW Capture Support: Yes Yes
Uncompressed Format: 12-bit RAW (.PEF, .DNG) 14-bit .CR2 RAW
Movie File Format:   H.264 (.MOV)
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 No
External Connections: USB 2.0 High Speed USB 2.0 High Speed
PictBridge Compliant: No Yes
DPOF Compliant: Yes Yes
Remote Control: Yes Yes
Remote Control Type: Optional IR Canon N3 terminal / PC tether
Connections (extended): AC adapter available  
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 <0.3
Buffer size for RAW shooting in single shot mode (frames): 10 40
Cycle time for RAW+JPEG shooting in single shot mode (seconds per shot):    
Camera penalizes early shutter press? No No
JPEG shooting speed in burst mode (fps, max resolution): 4.3 10.0
Buffer size for JPEG shooting in burst mode (frames, max resolution): 25 46
RAW shooting speed in burst mode (fps):    
Buffer size for RAW shooting in burst mode (frames):    
RAW+JPEG shooting speed in burst mode (fps):    
Buffer Size for RAW+JPEG shooting in burst mode (frames):    
Shutter lag (full AF, wide/mid): 0.10 seconds 0.10 seconds
Shutter lag (full AF, tele):    
Shutter lag (full AF, live view - DSLR):    
Shutter lag (prefocused, live view - DSLR):    
Shutter Lag (manual focus): 0.082 seconds 0.077 seconds
Shutter lag (full AF, with flash): 0.23 seconds  
Shutter Lag (prefocused): 0.082 seconds 0.049 seconds
Shutter Lag (notes): Live View: Phase-detect Full AF: 0.448s Contrast-detect Full AF: 2.567s Prefocused: 0.427s Live View: Quick Mode AF: 1.084s Live Mode AF: 1.255s Prefocused: 0.113s
Startup Time: 0.6 seconds 0.4 seconds
Play -> Record Time: 0.2 seconds 0.1 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) 1500 shots
Battery Life, Video:    
Battery Form Factor: 4 x AA Proprietary LP-E4
Usable Battery Types: Lithium, Alkaline disposables; NiMH rechargeables Lithium-ion rechargeable
Batteries Included: 4 x AA Alkaline disposables 1 x proprietary LP-E4 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  
OS Compatibility: Windows XP/Vista/7, MacOS-X 10.3+  
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. CompactFlash slot supports UDMA Mode 6 cards. Dual storage slots allow copying files between cards, storing different file types on each card, duplicating data on both cards, or using one card as an overflow when the other is full. Camera is powered by dual DIGIC 4 processors. Has live view and HD video modes with contrast detect AF. Has two internal monaural microphones - front panel for video, rear panel for voice memo. Also has stereo mic jack for external mic.