Comparisons / Comparison of Pentax K-7 and Sony Alpha DSLR-A900

Comparison of Pentax K-7 and Sony Alpha DSLR-A900 [S]ave

Attribute
Sony Alpha DSLR-A900 ×
Pentax K-7 ×
General
ModelSony Alpha DSLR-A900Pentax K-7
BrandSonyPentax
Manufacturer urlhttps://www.sony.com/https://us.ricoh-imaging.com/
Model numberA900K-7
Camera formatPro SLRPro SLR
Release year (year)20082009
Tripod mount++
Length (mm)156130
Width (mm)8274
Height (mm)11797
Weight (g)939758
Waterproof--
Predecessor-Pentax K20D
Successor-Pentax K-5
Image Sensor
Sensor typeCMOSCMOS
Sensor manufacturerSony-
Effective megapixels (MP)24.614.6
Sensor format35mmAPS-C
Sensor area (mm²)861.6369.72
Sensor width (mm)35.923.7
Sensor height (mm)2415.6
Approximate pixel pitch (micron)5.945.07
Focal Length Multiplier (x)11.5
Aspect ratio3:2, 16:93:2
Color filter typeRGBGRGBG
Anti aliasing filterFixedFixed
Self-cleaning++
Sensor shift image stabilization++
On-sensor phase detect--
Dxo sensor score7961
Dxo color depth score (bit)23.722.6
Dxo dynamic range score (evs)12.310.6
Dxo maximum effective iso score (iso)1,431536
Image Capture
Image resolution
  • 1984 x 1320(2.6 mp 3:2)
  • 2896 x 1928(5.6 mp 3:2)
  • 3024 x 1704(5.2 mp other)
  • 3024 x 2016(6.1 mp 3:2)
  • 3984 x 2656(10.6 mp 3:2)
  • 4400 x 2472(10.9 mp 16:9)
  • 4400 x 2936(12.9 mp 3:2)
  • 6048 x 3408(20.6 mp other)
  • 6048 x 4032(24.4 mp 3:2)
  • 1728 x 1152(2.0 mp 3:2)
  • 3072 x 2048(6.3 mp 3:2)
  • 3936 x 2624(10.3 mp 3:2)
  • 4672 x 3104(14.5 mp other)
Image file format
  • (arw 2.0)
  • craw
  • jpeg (exif 2.21)
  • raw
  • raw+jpeg
  • .dng)
  • jpeg (exif 2.21)
  • raw (.pef
Continuous-mode (fps)55.2
Video Capture
Can take movies-+
Movie resolution-
  • 1280x720
  • 1536x1024
  • 640x416
Image Storage
Movie file format-AVI (Motion JPEG)
Composite video out++
Ntsc/pal switchable video++
Video usable as viewfinder--
Hd video out++
Hd video connectionHDMIHDMI
Lens and Optics
Lens mountSony Alpha (Minolta A)Pentax K (KA/KAF/KAF2)
Integrated nd filter--
Optical image stabilization--
Digital zoom--
Auto Focus
Auto focus++
Auto focus type9-point TTL phase detection with 10 assist points, center dual-cross at f/2.8.11-point TTL phase-matching (SAFOX VIII)
Auto focus assist light++
Manual focus++
Viewfinder
ViewfinderOptical / LCD(playback only)Optical / LCD
Viewfinder typeSLR type; eye-level pentaprism with 100% coverage, 0.74x mag., 20mm eyepoint, -3 to +1 diopterSLR type; eye-level pentaprism, 100% coverage, 0.92x mag., -2.5 to 1.5 diopter
Focus peaking--
Viewfinder magnification (35mm equivalent) (x)0.740.61
Viewfinder magnification (nominal/claimed) (x)0.740.92
Display
Eye-level viewfinder++
Rear display++
Rear display size (inch)33
Rear display resolution (dots)921,600921,000
Touchscreen--
Articulating screen--
Tilt swivel screen--
Selfie screen--
Max playback zoom (x)1932
Top deck display++
Exposure
Maximum iso (native)3,2003,200
Minimum iso (native)200100
Iso settingsAuto, 200-3200, Extensions to 100 and 6400Auto, 100, 200, 400, 800, 1600, 3200, 6400 (expanded)
Auto iso mode++
White balance settings
  • 500k to 9
  • 900k
  • auto
  • cloudy
  • color temperature from 2
  • custom (3)
  • daylight
  • flash
  • fluorescent
  • shade
  • tungsten
  • auto
  • cloudy
  • color temperature
  • d
  • daylight
  • flash
  • fluorescent (w
  • n)
  • shade
  • tungsten
Shutter speed range (s)1/8000 - 301/8000 - 30
Bulb mode++
Exposure compensation+/- 3.0EV in 0.3EV steps+/- 5.0EV in 0.3EV steps
Explosure metering modes40-segment Honeycomb Pattern, Center-weighted, SpotTTL open-aperture: 77-segment, Center-weighted, Spot
Program auto exposure++
Aperture priority++
Shutter priority++
Full manual exposure++
Creative exposure modes-Sensitivity Priority, Shutter and Aperture Priority, USER, Movie
Self timer (s)
  • 2
  • 10
  • 2
  • 12
Time lapse (intervalometer)-+
High resolution composite--
Flash
Built-in flash-+
Flash modes-
  • on
  • redeye
  • slow sync
  • slow sync + redeye
  • trailing curtain sync
  • wireless
Flash guide number (iso 100) (m)-13
Flash range description-Depends on lens
Max flash sync (s)1/2501/180
Flash exposure compensation+/- 3.0 EV in 0.3EV steps-2 to +1 EV in 0.5EV steps
External flash connectionHot shoe, PC-syncHot Shoe, PC-Sync Socket
Built-in wireless flash control--
Usable memory types
  • cf1
  • cf2
  • microdriv
  • ms duo
  • ms pro duo
  • sd
  • sdh
Dual card slots+-
Raw capture support++
Uncompressed format
  • (arw 2.0)
  • craw
  • raw
  • raw+jpeg
  • .dng)
  • raw (.pef
Connectivity
Built-in wi-fi--
NFC--
Bluetooth--
Built-in gps--
Microphone jack--
Headphone jack--
External connections
  • usb 2.0 high speed
  • usb 2.0 high speed
Pictbridge compliant+-
Dpof compliant++
Remote control++
Remote control type
  • wired or wireless
  • wired or ir
Connections (extended)
  • dc input
  • hdmi type-c minijack
  • multi-connector
  • remote terminal
  • sync termimal
  • dc input
  • external stereo mic jack
  • wired remote
Performance Timing
Max cycle time for jpeg shooting (s/frame)0.40.3
Max cycle time for raw shooting (s/frame)0.410.3
Buffer size for raw shooting in single shot mode (frames)1513
Camera penalizes early shutter press--
Jpeg shooting speed in burst mode (max resolution) (fps)55.2
Buffer size for jpeg shooting in burst mode (max resolution) (frames)1120
Shutter lag (full af, wide/mid) (s)0.180.09
Shutter lag (manual focus) (s)0.150.07
Shutter lag (full af, with flash) (s)-0.15
Shutter lag (prefocused) (s)0.070.07
Shutter lag (notes)-Live ViewPhase-Detect Full AF: 1.2 secondsContrast-Detect Full AF: 2.3 secondsPrefocused: 0.405 second
Startup time (s)0.50.6
Play -> record time (s)0.30.1
Flash cycle time, full power (s)-3.7
Power
Battery life, still (cipa rating ovf/evf) (shots)880740
Battery form factorProprietaryProprietary D-LI90
Usable battery types
  • np-fm500h lithium-ion rechargeable
  • lithium-ion rechargeable
Batteries included1 x Proprietary NP-FM500H Lithium-ion rechargeable1 x Proprietary D-LI90 Lithium-ion rechargeable
Battery charger included (dedicated charger or ac/usb adapter)++
Software
Included software
  • image data converter sr
  • image data lightbox sr
  • picture motion browser (windows only).
  • remote camera control (all windows & macintosh)
  • cd-rom s-sw74/75
Os compatibility
  • windows 2000pro/xp/vista; mac os x (v 10.1.3+)
  • macos 10.2 or later
  • windows xp/vista
Miscellaneous
Notes and features24.6MP Full-frame CMOS sensor, In-body SteadyShot Image Stabilization, Intelligent Preview, Enhanced DRO, Magnesium-alloy BodySensor-shift image stabilization, new 77-segment metering system, Distortion and Lateral Chromatic Aberrations correction



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