• APS-C 369.7mm2
  • 12.4 megapixels
  • ISO 200 - 6400
  • APS-C 369.0mm2
  • 20.9 megapixels
  • ISO 100 - 51,200
  • Detailed specifications
  • Pentax K-x
  • Nikon Z50
Links
Prices:   Compare Prices
Manufacturer URL: Manufacturer website Manufacturer website
Predecessor: Pentax K2000
K2000 vs K-x
 
Successor: Pentax K-r
K-x vs K-r
 
General
Model Number: K-x Z50
Alternate Model Number(s):    
Camera Format: SLR Compact System Camera
Currently Manufactured: No Yes
Retail Price: $649.95 $999.95
Street Price: $701.76 $806.95
Date Available: 2009-10-15 2019-11-15
Tripod Mount: Yes Yes
Weight: 27.9 oz (791 g)
includes batteries, kit lens
18.8 oz (533 g)
includes batteries, kit lens
Size: 4.8 x 3.6 x 2.7 in.
(122 x 92 x 69 mm)
5.0 x 3.7 x 2.4 in.
(127 x 94 x 60 mm)
Waterproof: No No
Waterproof Depth: n/a n/a
Image Sensor
Sensor Type: CMOS CMOS
Sensor Manufacturer:    
Effective Megapixels: 12.4 20.9
Sensor Format: APS-C APS-C
Sensor size: 369.72mm2 (23.7mm x 15.6mm) 368.95mm2 (23.50mm x 15.70mm)
Approximate Pixel Pitch: 5.53 microns 4.22 microns
Focal Length Multiplier: 1.5x 1.5x
Aspect Ratio: 3:2 3:2
Color Filter Type: RGBG RGBG
Anti Aliasing Filter: Fixed None
Self-Cleaning: Yes No
Sensor shift image stabilization: Yes No
On-Sensor Phase Detect: No Yes
DxO Sensor Score: 72  
DxO Color Depth Score (bits): 22.8  
DxO Dynamic Range Score (evs): 12.5  
DxO Maximum Effective ISO Score (iso): 811  
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)
5568 x 3712 (20.7 MP, 3:2),
4176 x 2784 (11.6 MP, 3:2),
2784 x 1856 (5.2 MP, 3:2),
5568 x 3128 (17.4 MP, 16:9),
4176 x 2344 (9.8 MP, 16:9),
2784 x 1560 (4.3 MP, 16:9),
3712 x 3712 (13.8 MP, 1:1),
2784 x 2784 (7.8 MP, 1:1),
1856 x 1856 (3.4 MP, 1:1)
Image File Format: JPEG (EXIF 2.21), 12-bit RAW (.PEF, .DNG) JPEG (EXIF 2.31), .NEF (RAW), 12 or 14 bit; RAW+JPEG
Continuous-mode frames/second: 4.3 11.0
Video Capture
Can take movies: Yes Yes
Movie Resolution: 1280x720 (24)
640x416 (24)
3840x2160 (30p/​25p/​24p)
1920x1080 (120p/​100p/​60p/​50p/​30p/​25p/​24p)
Movie File Format:   MOV, MP4 (Video: H.264/MPEG-4 AVC; Audio: Stereo Linear PCM, AAC)
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 Z
Lens: smc Pentax DA L 18-55mm f/3.5-5.6 AL Nikon Z DX 16-50mm f/3.5-6.3 VR
Focal Length (35mm equivalent): 27 - 84mm 24 - 75mm
Focal Length (actual): 18 - 55mm 16 - 50mm
Zoom Ratio: 3.00x 3.10x
Aperture Range: f/3.5 - 22 (W), f/5.6 - 38 (T) f/3.5 (wide) / f/6.3 (tele) - f/16
Integrated ND Filter: No
Normal Focus Range:   20 cm to Infinity
7.9 in to Infinity
Macro Focus Range:    
Filter Thread: 52.0mm 46.0mm
Thread Type: n/a n/a
Optical Image Stabilization: No Yes
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 Hybrid Phase/Contrast Detect AF with 209 PDAF points; Pinpoint, Single-Point, Dynamic-area AF, Wide-area AF (S/L), Auto-area AF; Face and Eye-detect AF
Auto Focus Assist Light? Yes Yes
Manual Focus: Yes Yes
Viewfinder
Viewfinder: Optical / LCD EVF / LCD
Viewfinder Type: SLR type; fixed eye-level pentamirror, 96% coverage, 0.85x mag., -2.5 to +1.5 diopter EVF: 2.36M-dot XGA OLED, 100% coverage, 1.02x magnification, 20mm eyepoint, -3 to +3 diopter, eye sensor
Focus Peaking: No Yes
EVF Resolution: n/a 2,360,000 dots
Viewfinder Magnification (35mm equivalent): 0.57x 0.68x
Viewfinder Magnification (nominal/claimed): 0.85x 1.02x
Display
Eye-level Viewfinder: Yes Yes
Rear Display: Yes Yes
Rear Display Size (inches): 2.7 3.2
Rear Display Resolution: 230,000 dots 1,036,800 dots (345,600 px)
Touchscreen: No Yes
Articulating Screen: No Yes
Tilt Swivel Screen: No No
Selfie Screen: No Yes
Max Playback Zoom: 16.0x  
Top Deck Display: No No
Exposure
Maximum ISO (native): 6400 51200
Minimum ISO (native): 200 100
ISO Settings: Auto (200-6400), 100, 200, 400, 800, 1600, 3200, 6400; expandable to 12800 Auto, ISO 100 - 51200, expandable to 204,800
Auto ISO Mode: Yes Yes
White Balance Settings: Auto, Daylight, Shade, Cloudy, Tungsten, Fluorescent (D, N, W, L), Flash, Custom Auto (2 types), Cloudy, Shade, Direct Sunlight, Flash, Fluorescent (7 types), Incandescent, Kelvin Color Temperature (2,500K-10,000K), Preset manual; Fine tuning available.
Shutter Speed Range: 1/6000 - 30 sec 1/4000 - 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 Matrix metering; Center-weighted (weight of approximately 75% given to 8mm circle in center of frame or weighting can be based on average of entire frame; Spot: meters circle with diameter of about 3.5mm (about 2.5% of frame) centered on selected focus point; Highlight-weighted
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 Custom: U1, U2; Scene Modes: Autumn Colors, Beach / Snow, Blossom, Candlelight, Child, Close-up, Dusk / Dawn, Food, Landscape, Night Landscape, Night Portrait, Party / Indoor, Pet Portrait, Portrait, Sports, Sunset; Special Effects: Night Vision, Super Vivid, Pop, Photo Illustration, Toy Camera Effect, Miniature Effect, Selective Color, Silhouette, High Key, Low Key
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):    
High Resolution Composite: No No
Flash
Built-in Flash: Yes Yes
Flash Modes: On, off, redeye, slow sync, slow sync w redeye, slow sync w trailing curtain, wireless Fill flash, Red-eye reduction, Slow sync, Red-eye reduction with slow sync, Rear-curtain sync, Auto, Auto with red-eye reduction, Auto slow sync, Auto slow sync with red-eye reduction, Flash off; Auto FP High-Speed sync supported
Flash Guide Number (ISO 100): 11.3 m / 37.1 ft. 7.0 m / 23.0 ft.
Flash Range Description: Depends on lens GN=7m/22ft at ISO 100; range depends on lens aperture
Max Flash Sync: 1/180 1/200
Flash Exposure Compensation: -2 to +1 EV in 0.5EV steps -3 to +1 EV in 0.3EV steps
External Flash Connection: Hot Shoe Hot Shoe
Built-In Wireless Flash Control: Full TTL exposure No
Image Storage
Usable Memory Types: SD / SDHC SD / SDHC / SDXC
UHS Support:   UHS-I
Other Memory:    
Dual Card Slots: No No
RAW Capture Support: Yes Yes
Uncompressed Format: 12-bit RAW (.PEF, .DNG) .NEF (RAW), 12 or 14 bit; RAW+JPEG
Movie File Format:   MOV, MP4 (Video: H.264/MPEG-4 AVC; Audio: Stereo Linear PCM, AAC)
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 No
External Connections: USB 2.0 High Speed USB 2.0 High Speed,Bluetooth,WiFi
PictBridge Compliant: No Yes
DPOF Compliant: Yes Yes
Remote Control: Yes Yes
Remote Control Type: Optional IR Wi-Fi/Bluetooth
Connections (extended): AC adapter available Micro (Type-D) HDMI, Micro-B USB 2.0, 3.5mm Stereo Microphone Jack (plug-in power supported)
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): 0.43  
Buffer size for RAW shooting in single shot mode (frames): 10  
Cycle time for RAW+JPEG shooting in single shot mode (seconds per shot):    
Camera penalizes early shutter press? No
JPEG shooting speed in burst mode (fps, max resolution): 4.3 11.0
Buffer size for JPEG shooting in burst mode (frames, max resolution): 25  
RAW shooting speed in burst mode (fps):   11.0
Buffer size for RAW shooting in burst mode (frames):    
RAW+JPEG shooting speed in burst mode (fps):   11.0
Buffer Size for RAW+JPEG shooting in burst mode (frames):    
Shutter lag (full AF, wide/mid): 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  
Shutter lag (full AF, with flash): 0.23 seconds  
Shutter Lag (prefocused): 0.082 seconds  
Shutter Lag (notes): Live View: Phase-detect Full AF: 0.448s Contrast-detect Full AF: 2.567s Prefocused: 0.427s  
Startup Time: 0.6 seconds  
Play -> Record Time: 0.2 seconds  
Flash cycle time, full power: 3.3 seconds  
Power
Battery Life, Stills (CIPA Rating Monitor/Live View):   320 shots
Battery Life, Still (CIPA Rating OVF/EVF): 420 shots (NiMH AA) 280 shots
Battery Life, Video:   75 minutes
Battery Form Factor: 4 x AA Proprietary EN-EL25
Usable Battery Types: Lithium, Alkaline disposables; NiMH rechargeables Lithium-ion rechargeable
Batteries Included: 4 x AA Alkaline disposables 1 x Proprietary EN-EL25 Lithium-ion rechargeable
Battery Charger Included (dedicated charger or AC/USB adapter): No Yes
Dedicated Battery Charger Included: Yes
Internal Charging Supported: Yes
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.