Comparisons / Comparison of Pentax K-r and Sony Alpha SLT-A57

Comparison of Pentax K-r and Sony Alpha SLT-A57 [S]ave

Attribute
Sony Alpha SLT-A57 ×
Pentax K-r ×
General
ModelSony Alpha SLT-A57Pentax K-r
BrandSonyPentax
Manufacturer urlhttps://www.sony.com/https://us.ricoh-imaging.com/
Model numberA57K-r
Camera formatSLRSLR
Release year (year)20122010
Tripod mount++
Length (mm)132125
Width (mm)8168
Height (mm)9897
Weight (g)828852
Waterproof--
Predecessor-Pentax K-x
Image Sensor
Sensor typeCMOSCMOS
Sensor manufacturerSony-
Effective megapixels (MP)16.112.4
Sensor formatAPS-CAPS-C
Sensor area (mm²)369.72369.72
Sensor width (mm)23.723.7
Sensor height (mm)15.615.6
Approximate pixel pitch (micron)4.825.53
Focal Length Multiplier (x)1.51.5
Aspect ratio3:23:2
Color filter typeRGBGRGBG
Anti aliasing filterFixedFixed
Self-cleaning++
Sensor shift image stabilization++
On-sensor phase detect--
Dxo sensor score7572
Dxo color depth score (bit)23.422.9
Dxo dynamic range score (evs)1312.4
Dxo maximum effective iso score (iso)785750
Image Capture
Image resolution
  • 12416 x 1856(23.0 mp other)
  • 1920 x 1080(2.1 mp 16:9)
  • 2448 x 1376(3.4 mp 16:9)
  • 2448 x 1624(4.0 mp other)
  • 3568 x 2000(7.1 mp 16:9)
  • 3568 x 2368(8.4 mp other)
  • 3872 x 2160(8.4 mp other)
  • 4912 x 1080(5.3 mp other)
  • 4912 x 2760(13.6 mp 16:9)
  • 4912 x 3264(16.0 mp 3:2)
  • 5536 x 2160(12.0 mp other)
  • 7152 x 1080(7.7 mp other)
  • 8192 x 1856(15.2 mp other)
  • 1728 x 1152(2.0 mp 3:2)
  • 3072 x 2048(6.3 mp 3:2)
  • 3936 x 2624(10.3 mp 3:2)
  • 4288 x 2848(12.2 mp other)
Image file format
  • jpeg
  • mpo
  • raw (12-bit arw 2.3)
  • raw+jpeg
  • .dng)
  • 12-bit raw (.pef
  • jpeg (exif 2.21)
Continuous-mode (fps)105.6
Video Capture
Can take movies++
Movie resolution
  • 1440x1080
  • 1920x1080
  • 640x480
  • 1280x720
  • 640x480
Movie max framerate (fps)60-
Image Storage
Movie file formatAVCHD 2.0/MP4 (Audio: Dolby Digital (AC-3)/MPEG-4 AAC-LC)AVI (Motion JPEG)
Composite video out-+
Ntsc/pal switchable video-+
Video usable as viewfinder--
Hd video out+-
Hd video connectionHDMI-
Lens and Optics
Lens mountSony Alpha (Minolta A)Pentax K (KA/KAF/KAF2/3)
LensSony 18-55mm f/3.5-5.6 DT SAMsmc Pentax DA L 18-55mm f/3.5-5.6 AL
Focal length (35mm equivalent) (mm)27.00 - 83.0027.00 - 84.00
Focal length (actual) (mm)18.00 - 55.0018.00 - 55.00
Zoom ratio (x)3.063
Aperture range (f)0.18 - 0.290.18 - 0.29
Integrated nd filter--
Min focus range (cm)2525
Filter thread (mm)5552
Optical image stabilization--
Digital zoom+-
Digital zoom values (x)
  • 1.4
  • 2
  • 2
  • 2.0
-
Auto Focus
Auto focus++
Auto focus typePhase Detection: 15 points (3 points cross type); Wide (auto, 15 points), Zone, Spot, Local; Enhanced Object TrackingSAFOX IX TTL phase-detect 11-point (9 cross) AF: 11 pt auto, 5 pt auto, AF pt select, center/spot
Auto focus assist light++
Manual focus++
Viewfinder
ViewfinderEVF / LCDOptical / LCD
Viewfinder typeEVF type; 1.1cm (0.43") 1.44M/1.25M-dot LCD (480K/418K-dot time-multiplexed RGB), 100% coverage, 1.04x/0.97x magnification, 23SLR type; eye-level pentamirror, ~96% coverage, ~0.85x mag., -2.5 to +1.5 diopter
Focus peaking+-
Viewfinder magnification (35mm equivalent) (x)0.690.57
Viewfinder magnification (nominal/claimed) (x)1.040.85
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)1316
Top deck display--
Exposure
Maximum iso (native)16,00012,800
Minimum iso (native)100200
Iso settingsAuto (100-3200), 100 - 16000; (Multi-frame NR mode up to ISO 25600)Auto: 200-12800 (1, 1/2, 1/3 EV steps), up to 1600 in Bulb, expandable to 100-25600; Manual: 200-12800 (1, 1/2, 1/3 EV steps)
Auto iso mode++
White balance settings
  • auto
  • cloudy
  • color temp./ filter (2500-9900k with 15-step magenta/green compensation)
  • custom
  • daylight
  • flash
  • fluorescent (4)
  • incandescent
  • shade
  • auto
  • cloudy
  • cte
  • daylight
  • flash
  • fluorescent (d
  • l)
  • manual
  • n
  • shade
  • tungsten
  • w
Shutter speed range (s)1/4000 - 301/6000 - 30
Bulb mode++
Exposure compensation+/- 3.0EV in 0.3EV steps+/- 3.0EV in 0.3EV steps
Explosure metering modes1200-zone Evaluative, Center-weighted, Spot16-segment Multi, Center-weighted, Spot
Program auto exposure++
Aperture priority++
Shutter priority++
Full manual exposure++
Creative exposure modesPortrait, SportsAction, Macro, Landscape, Sunset, Night scene, Hand-held Twilight (6 shot layering), Night PortraitPicture (Portrait, Landscape, Macro, Action, Night Scene Portrait, Standard Flash Off), Scene (Night Scene, Surf & Snow, Food
Self timer (s)
  • 2
  • 10
  • 2
  • 12
High resolution composite--
Flash
Built-in flash++
Flash modes
  • auto
  • fill-flash
  • high-speed sync
  • off
  • rear sync
  • red-eye reduction: on/off
  • slow sync
  • wireless
  • off
  • on
  • redeye
  • slow sync
  • slow sync w redeye
  • slow sync w trailing curtain
  • wireless
Flash guide number (iso 100) (m)1012
Flash range descriptionLens dependentDepends on lens
Max flash sync (s)1/1601/180
Flash exposure compensation+/- 2.0 EV in 0.3EV steps-2 to +1 EV in 0.5EV steps
External flash connectionHot shoeHot Shoe
Built-in wireless flash control--
Usable memory types
  • ms pro duo
  • sd
  • sdhc
  • sdx
  • sd
  • sdhc
  • sdx
Dual card slots--
Raw capture support++
Uncompressed format
  • raw (12-bit arw 2.3)
  • raw+jpeg
  • .dng)
  • 12-bit 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
  • optional wireless or wired
  • optional ir
Connections (extended)
  • 3.5mm external stereo micophone jack
  • dc input
  • phototv hd)
  • type-c mini hdmi (bravia sync
  • wired remote terminal
  • irsimple infrared data transfer
Performance Timing
Max cycle time for jpeg shooting (s/frame)-0.31
Max cycle time for raw shooting (s/frame)-0.31
Buffer size for raw shooting in single shot mode (frames)-17
Camera penalizes early shutter press--
Jpeg shooting speed in burst mode (max resolution) (fps)105.6
Buffer size for jpeg shooting in burst mode (max resolution) (frames)2530
Shutter lag (full af, wide/mid) (s)-0.11
Shutter lag (manual focus) (s)-0.1
Shutter lag (full af, with flash) (s)-0.15
Shutter lag (prefocused) (s)-0.1
Shutter lag (notes)-OVF:Full AF lag, Auto-Area: 0.118sLive View:Contrast-Detect AF: 1.049sPhased-Detect AF: 1.197sPrefocused: 0.335s
Startup time (s)-0.3
Play -> record time (s)-0.3
Power
Battery life, still (cipa rating ovf/evf) (shots)550470
Battery form factorProprietaryProprietary D-LI109
Usable battery types
  • np-fm500h lithium-ion rechargeable
  • lithium-ion rechargeable or 4 aas with d-bh109
Batteries included1 x Proprietary NP-FM500H Lithium-ion rechargeable1 x Proprietary D-LI109 Lithium-ion rechargeable
Battery charger included (dedicated charger or ac/usb adapter)++
Dedicated battery charger included+-
Internal charging supported--
Software
Included software
  • sony software cd-rom
  • software cd-rom s-sw110
Os compatibility
  • mac os x (v.10.3 +)
  • windows xp sp3/vista sp2/7
  • macos-x 10.3+
  • windows xp/vista/7
Miscellaneous
Notes and featuresSteadyShot INSIDE Sensor-shift Image Stabilization (up to 4.5 EV correction), Full HD 1080p60 VideoSensor-shift shake reduction, new 11-point SAFOX IX AF system with viewfinder focus indicators, 3-inch hi-res LCD



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