• APS-C 369.7mm2
  • 12.4 megapixels
  • ISO 200 - 6400
  • 1/2.3 inch 28.1mm2
  • 12.1 megapixels
  • 24.00mm - 840.00mm (35mm eq.)
  • Detailed specifications
  • Pentax K-x
  • Canon PowerShot SX40 HS
Links
Prices:    
Manufacturer URL: Manufacturer website Manufacturer website
Predecessor: Pentax K2000
K2000 vs K-x
Canon SX30 IS
SX30 IS vs SX40 HS
Successor: Pentax K-r
K-x vs K-r
Canon SX50
SX40 HS vs SX50
General
Model Number: K-x SX40 HS
Alternate Model Number(s):    
Camera Format: SLR EVF
Currently Manufactured: No No
Retail Price: $649.95 $429.99
Street Price: $701.76 $342.36
Date Available: 2009-10-15 2011-09-30
Tripod Mount: Yes Yes
Weight: 27.9 oz (791 g)
includes batteries, kit lens
21.4 oz (606 g)
includes batteries
Size: 4.8 x 3.6 x 2.7 in.
(122 x 92 x 69 mm)
4.8 x 3.6 x 4.2 in.
(123 x 92 x 108 mm)
Waterproof: No No
Waterproof Depth: n/a n/a
Image Sensor
Sensor Type: CMOS CMOS
Sensor Manufacturer:    
Effective Megapixels: 12.4 12.1
Sensor Format: APS-C 1/2.3 inch
Sensor size: 369.72mm2 (23.7mm x 15.6mm) 28.0735mm2 (6.17mm x 4.55mm)
Approximate Pixel Pitch: 5.53 microns 1.54 microns
Focal Length Multiplier: 1.5x n/a
Aspect Ratio: 3:2 4:3
Color Filter Type: RGBG RGBG
Anti Aliasing Filter: Fixed  
Self-Cleaning: Yes No
Sensor shift image stabilization: Yes No
On-Sensor Phase Detect: No No
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)
4000 x 3000 (12.0 MP, 4:3),
4000 x 2664 (10.7 MP, 3:2),
4000 x 2248 (9.0 MP, 16:9),
2992 x 2992 (9.0 MP, 1:1),
2816 x 1880 (5.3 MP, 3:2),
2816 x 1584 (4.5 MP, 16:9),
2112 x 2112 (4.5 MP, 1:1),
1920 x 1080 (2.1 MP, 16:9),
1600 x 1200 (1.9 MP, 4:3),
1600 x 1064 (1.7 MP, 3:2),
1200 x 1200 (1.4 MP, 1:1),
640 x 480 (0.3 MP, 4:3),
640 x 424 (0.3 MP, Other),
480 x 480 (0.2 MP, 1:1)
Image File Format: JPEG (EXIF 2.21), 12-bit RAW (.PEF, .DNG) JPEG (EXIF 2.2)
Continuous-mode frames/second: 4.3 10.3
Video Capture
Can take movies: Yes Yes
Movie Resolution: 1280x720 (24)
640x416 (24)
1920x1080 (24p)
1280x720 (30p)
640x480 (30/​120)
320x240 (30/​240)
Movie File Format:   MOV (Image: H.264, Audio: Stereo PCM)
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) n/a
Lens: smc Pentax DA L 18-55mm f/3.5-5.6 AL Canon Zoom Lens; 13 elements in 10 groups, Ultra Sonic Motor (USM)
Focal Length (35mm equivalent): 27 - 84mm 24 - 840mm
Focal Length (actual): 18 - 55mm 4.3 - 150.5mm
Zoom Ratio: 3.00x 35.00x
Aperture Range: f/3.5 - 22 (W), f/5.6 - 38 (T) f/2.7 (W) / f/5.8 (T) - f/8.0
Integrated ND Filter: No No
Normal Focus Range:   5 cm to Infinity
2.0 in to Infinity
Macro Focus Range:   0 - 50 cm
0.0 - 19.7 in
Filter Thread: 52.0mm n/a
Thread Type: n/a n/a
Optical Image Stabilization: No Yes
Digital Zoom: No Yes
Digital Zoom Values: n/a Up to 4x
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 Contrast Detect AF with Face Detection;
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 type; 202K-dot LCD with diopter adjustment of -4 to +1
Focus Peaking: No No
EVF Resolution: n/a  
Viewfinder Magnification (35mm equivalent): 0.57x  
Viewfinder Magnification (nominal/claimed): 0.85x  
Display
Eye-level Viewfinder: Yes Yes
Rear Display: Yes Yes
Rear Display Size (inches): 2.7 2.7
Rear Display Resolution: 230,000 dots 230,000 dots
Touchscreen: No No
Articulating Screen: No Yes
Tilt Swivel Screen: No
Selfie Screen: No
Max Playback Zoom: 16.0x 10.0x
Top Deck Display: No
Exposure
Maximum ISO (native): 6400  
Minimum ISO (native): 200  
ISO Settings: Auto (200-6400), 100, 200, 400, 800, 1600, 3200, 6400; expandable to 12800 Auto, 100, 200, 400, 800, 1600, 3200
Auto ISO Mode: Yes Yes
White Balance Settings: Auto, Daylight, Shade, Cloudy, Tungsten, Fluorescent (D, N, W, L), Flash, Custom Auto (including Face Detection WB), Daylight, Cloudy, Tungsten, Fluorescent, Fluorescent H, Flash, Custom. Multi-area WB correction available in Smart Auto
Shutter Speed Range: 1/6000 - 30 sec 1/3200 - 15 sec
Bulb Mode: Yes No
Exposure Compensation: +/- 2.0EV in 0.3EV steps +/- 2.0EV in 0.3EV steps
Metering Modes: 16-segment Multi, Center-weighted, Spot Evaluative, Center-weighted average, Spot (centre or linked to Face Detection AF or FlexiZone AF frame)
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 Custom1, Custom2, Sports, SCN (Movie Digest, Portrait, Landscape, Smart Shutter(Smile, Wink Self-Timer, FaceSelf-Timer), High-speed Burst HQ, Handheld Night Scene, Low Light (3.0MP), Beach, Foliage, Snow, Fireworks, Stich Assist), Creative Filters (Fish-eye Effect, Miniature Effect, Toy Camera Effect, Monochrome, Super Vivid, Poster Effect, Color Accent, Color Swap)
Self Timer: 2 or 12 seconds 2, 10, Custom 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 Auto, Red-eye Reduction, Auto Red-eye Correction, Flash On, Flash Off; FE lock, Slow Synchro, Smart Flash
Flash Guide Number (ISO 100): 11.3 m / 37.1 ft. n/a
Flash Range Description: Depends on lens Auto ISO: 1.6 - 23 ft. (W), 4.6 - 9.8 ft. (T), (50 cm - 7.0 m (W), 1.4 - 3.0 m (T))
Max Flash Sync: 1/180 1/2000
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 (E-TTL)
Built-In Wireless Flash Control: Full TTL exposure  
Image Storage
Usable Memory Types: SD / SDHC SD / SDHC / SDXC
UHS Support:    
Other Memory:    
Dual Card Slots: No No
RAW Capture Support: Yes No
Uncompressed Format: 12-bit RAW (.PEF, .DNG)  
Movie File Format:   MOV (Image: H.264, Audio: Stereo 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 No
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
Remote Control Type: Optional IR  
Connections (extended): AC adapter available Mini HDMI
Performance Timing
Cycle time for JPEG shooting in single shot mode (seconds per frame, max resolution): 0.39 2.56
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 10.3
Buffer size for JPEG shooting in burst mode (frames, max resolution): 25 8
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 0.46 seconds
Shutter lag (full AF, tele):   0.58 seconds
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 0.116 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 2.6 seconds
Play -> Record Time: 0.2 seconds 1.9 seconds
Flash cycle time, full power: 3.3 seconds 5.4 seconds
Power
Battery Life, Stills (CIPA Rating Monitor/Live View):   380 shots
Battery Life, Still (CIPA Rating OVF/EVF): 420 shots (NiMH AA)  
Battery Life, Video:    
Battery Form Factor: 4 x AA Proprietary NB-10L
Usable Battery Types: Lithium, Alkaline disposables; NiMH rechargeables Lithium-ion rechargeable
Batteries Included: 4 x AA Alkaline disposables 1 x Proprietary NB-10L Lithium-ion rechargeable
Battery Charger Included (dedicated charger or AC/USB adapter): No Yes
Dedicated Battery Charger Included:
Internal Charging Supported:
Software
Included Software: CD-ROM Digital Camera Solution CD-ROM
OS Compatibility: Windows XP/Vista/7, MacOS-X 10.3+ Windows 7 / 7 SP1 / Vista SP2 / XP SP3 Mac OS X v10.5 - 10.6
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. Intelligent Image Stabilization, DIGIC 5 Processor, Full HD 1080p Videos, High-Speed Burst HQ (10.3fps at full resolution).