• APS-C 369.7mm2
  • 16.1 megapixels
  • ISO 100 - 16,000
  • 4/3 224.9mm2
  • 20.3 megapixels
  • ISO 200 - 25,600
  • Detailed specifications
  • Sony Alpha SLT-A57
  • Panasonic Lumix DC-G9
Links
Prices:   Compare Prices
Manufacturer URL: Manufacturer website Manufacturer website
Predecessor:   Panasonic G85
G85 vs G9
Successor:    
General
Model Number: A57 G9
Alternate Model Number(s):    
Camera Format: SLR Compact System Camera
Currently Manufactured: No Yes
Retail Price: $799.99 $1699.99
Street Price:   $965.32
Date Available: 2012-04-15 2018-01-03
Tripod Mount: Yes Yes
Weight: 29.2 oz (828 g)
includes batteries, kit lens
23.2 oz (658 g)
includes batteries
Size: 5.2 x 3.8 x 3.2 in.
(132 x 98 x 81 mm)
5.4 x 3.8 x 3.6 in.
(137 x 97 x 92 mm)
Waterproof: No No
Waterproof Depth: n/a n/a
Image Sensor
Sensor Type: CMOS Live MOS
Sensor Manufacturer: Sony Panasonic
Effective Megapixels: 16.1 20.3
Sensor Format: APS-C 4/3
Sensor size: 369.72mm2 (23.7mm x 15.6mm) 224.9mm2 (17.30mm x 13.00mm)
Approximate Pixel Pitch: 4.82 microns 3.34 microns
Focal Length Multiplier: 1.5x 2.0x
Aspect Ratio: 3:2 4:3
Color Filter Type: RGBG RGBG
Anti Aliasing Filter: Fixed None
Self-Cleaning: Yes Yes
Sensor shift image stabilization: Yes Yes
On-Sensor Phase Detect: No No
DxO Sensor Score: 75  
DxO Color Depth Score (bits): 23.4  
DxO Dynamic Range Score (evs): 13.0  
DxO Maximum Effective ISO Score (iso): 785  
Image Capture
Image Resolution: 4912 x 3264 (16.0 MP, 3:2),
4912 x 2760 (13.6 MP, 16:9),
3568 x 2368 (8.4 MP, Other),
3568 x 2000 (7.1 MP, 16:9),
2448 x 1624 (4.0 MP, Other),
2448 x 1376 (3.4 MP, 16:9),
12416 x 1856 (23.0 MP, Other),
5536 x 2160 (12.0 MP, Other),
8192 x 1856 (15.2 MP, Other),
3872 x 2160 (8.4 MP, Other),
7152 x 1080 (7.7 MP, Other),
4912 x 1080 (5.3 MP, Other),
1920 x 1080 (2.1 MP, 16:9)
5184 x 3888 (20.2 MP, 4:3),
3712 x 2784 (10.3 MP, 4:3),
2624 x 1968 (5.2 MP, 4:3),
5184 x 3456 (17.9 MP, 3:2),
3712 x 2480 (9.2 MP, 3:2),
2624 x 1752 (4.6 MP, 3:2),
5184 x 2920 (15.1 MP, 16:9),
3840 x 2160 (8.3 MP, 16:9),
1920 x 1080 (2.1 MP, 16:9),
3888 x 3888 (15.1 MP, 1:1),
2784 x 2784 (7.8 MP, 1:1),
1968 x 1968 (3.9 MP, 1:1),
4992 x 3744 (18.7 MP, 4:3),
3328 x 2496 (8.3 MP, 4:3),
5184 x 3456 (17.9 MP, 3:2),
3504 x 2336 (8.2 MP, 3:2),
3840 x 2160 (8.3 MP, 16:9),
2880 x 2880 (8.3 MP, 1:1),
10368 x 7776 (80.6 MP, 4:3),
7296 x 5472 (39.9 MP, 4:3),
10368 x 6911 (71.7 MP, 3:2),
7296 x 4863 (35.5 MP, 3:2),
10368 x 5832 (60.5 MP, 16:9),
7296 x 4104 (29.9 MP, 16:9)
Image File Format: JPEG, MPO, RAW (12-bit ARW 2.3), RAW+JPEG JPEG (EXIF 2.31), RAW, RAW + JPEG
Continuous-mode frames/second: 10.0 60.0
Video Capture
Can take movies: Yes Yes
Movie Resolution: 1920x1080 (60p(PS)/​60i(FX)/​60i(FH)/​24p(FX)/​24p(FH))
1440x1080 (30p)
640x480 (30p)
3840x2160 (60p/​30p/​24p)
1920x1080 (60p/​60i/​30p/​24p)
3840x2160 (60p/​48p)
1920x1080 (180p)
Movie File Format: AVCHD 2.0/MP4 (Audio: Dolby Digital (AC-3)/MPEG-4 AAC-LC) MP4, AVCHD, AVCHD Progressive
Composite Video Out: No No
NTSC/PAL Switchable Video: n/a n/a
Video Usable as Viewfinder: n/a n/a
HD Video Out: Yes Yes
HD Video Connection: HDMI HDMI
Lens & Optics
Lens Mount: Sony Alpha (Minolta A) Micro Four Thirds
Lens: Sony 18-55mm f/3.5-5.6 DT SAM n/a
Focal Length (35mm equivalent): 27 - 83mm  
Focal Length (actual): 18 - 55mm  
Zoom Ratio: 3.06x  
Aperture Range: f/3.5 - 22 (W), f/5.6 - 36 (T)  
Integrated ND Filter: No No
Normal Focus Range: 25 cm to Infinity
9.8 in to Infinity
 
Macro Focus Range:    
Filter Thread: 55.0mm n/a
Thread Type: n/a n/a
Optical Image Stabilization: No No
Digital Zoom: Yes Yes
Digital Zoom Values: Up to 2x Precision, Up to 2x Clear Image Zoom, 1.4x (8.4MP) or 2.0x (4MP) Smart Zoom 2x, 4x; Extra Tele Conversion: Still image: Max. 2x; 4K PHOTO: 1.6x (4:3), 1.5x (3:2), 1.4x (16:9, 1:1); Motion picture: 2.7x (FHD), 1.4x (4K)
Auto Focus
Auto Focus: Yes Yes
Auto Focus Type: Phase Detection: 15 points (3 points cross type); Wide (auto, 15 points), Zone, Spot, Local; Enhanced Object Tracking Contrast Detection with DFD: Face/Eye detection, Tracking, 225-area, Custom Multi, 1-area, Pinpoint; One Shot AF, Shutter AF, Half Press Release, Quick AF, Continuous AF (during motion picture recording), Eye Sensor AF, AF-Point Scope Setting, AF+MF, MF Assist, Touch MF Assist, Focus Peaking, Touch AF/AE Function, Touch Pad AF, Touch Shutter
Auto Focus Assist Light? Yes Yes
Manual Focus: Yes Yes
Viewfinder
Viewfinder: EVF / LCD EVF / LCD
Viewfinder Type: EVF type; 1.1cm (0.43") 1.44M/1.25M-dot LCD (480K/418K-dot time-multiplexed RGB), 100% coverage, 1.04x/0.97x magnification, 23.1/25.2mm eyepoint, -4 to +3 diopter 3680K-dot OLED, 1.66x / 0.83x (35mm eq.) magnification, 21mm eyepoint, -4 to +3 diopter, eye sensor
Focus Peaking: Yes Yes
EVF Resolution:   3,680,000 dots
Viewfinder Magnification (35mm equivalent): 0.69x 0.83x
Viewfinder Magnification (nominal/claimed): 1.04x 1.66x
Display
Eye-level Viewfinder: Yes Yes
Rear Display: Yes Yes
Rear Display Size (inches): 3.0 3.0
Rear Display Resolution: 921,600 dots (307,200 px) 1,040,000 dots (346,600 px)
Touchscreen: No Yes
Articulating Screen: Yes Yes
Tilt Swivel Screen: Yes
Selfie Screen: Yes
Max Playback Zoom: 13.6x 16.0x
Top Deck Display: No Yes
Exposure
Maximum ISO (native): 16000 25600
Minimum ISO (native): 100 200
ISO Settings: Auto (100-3200), 100 - 16000; (Multi-frame NR mode up to ISO 25600) Auto, iISO, 100 (extended), 200 - 25600; in 1 or 1/3 EV steps
Auto ISO Mode: Yes Yes
White Balance Settings: Auto, Daylight, Shade, Cloudy, Incandescent, Fluorescent (4), Flash, Custom, Color Temp./ Filter (2500-9900K with 15-step Magenta/Green compensation) Auto, Autoc, Daylight, Cloudy, Shade, Incandescent, Flash, White Set 1-4, Color Temperature Setting 1-4 (2,500-10,000K in 100K steps)
Shutter Speed Range: 1/4000 - 30 sec 1/32000 - 60 sec
Bulb Mode: Yes Yes
Exposure Compensation: +/- 3.0EV in 0.3EV steps +/- 5.0EV in 0.3EV steps
Metering Modes: 1200-zone Evaluative, Center-weighted, Spot 1728-zone Intelligent Multiple, Center-weighted, Spot
Program Auto Exposure: Yes Yes
Aperture Priority: Yes Yes
Shutter Priority: Yes Yes
Full Manual Exposure: Yes Yes
Creative Exposure Modes: Portrait, SportsAction, Macro, Landscape, Sunset, Night scene, Hand-held Twilight (6 shot layering), Night Portrait; Sweep Panorama, 3D Sweep Panorama, Auto Portrait Framing, Picture Effect (Posterization (Color, B/W), Pop Color, Retro Photo, Partial Color (R,G,B,Y), High Contrast Monochrome, Toy Camera, Soft High-key, Soft Focus, HDR Painting, Rich-tone Monochrome, Miniature), Dynamic Range Optimizer (Off/Auto/Level), Creative Control: Expressive, Retro, Old Days, High Key, Low Key, Sepia, Monochrome, Dynamic Monochrome, Rough Monochrome, Silky Monochrome, Impressive Art, High Dynamic, Cross Process, Toy Effect, Toy Pop, Bleach Bypass, Miniature Effect, Soft Focus, Fantasy, Star Filter, One Point Color, Sunshine
Self Timer: 2 or 10 seconds 2, 10, 3 shots in 10 seconds
Time Lapse (intervalometer):   Yes
High Resolution Composite: No 80.6 megapixels
Flash
Built-in Flash: Yes No
Flash Modes: Auto, Off, Fill-flash, Rear sync, Wireless, High-Speed sync, Slow sync, Red-eye reduction: On/Off Auto, Auto/Red-eye Reduction, Forced On, Forced On/Red-eye Reduction, Slow Sync., Slow Sync./Red-eye Reduction, Forced Off; 1st. Curtain Sync, 2nd Curtain Sync.
Flash Guide Number (ISO 100): 10.0 m / 32.8 ft. n/a
Flash Range Description: Lens dependent n/a
Max Flash Sync: 1/160 1/250
Flash Exposure Compensation: +/- 2.0 EV in 0.3EV steps +/- 3.0 EV in 0.3EV steps
External Flash Connection: Hot shoe Hot Shoe, PC Sync Terminal
Built-In Wireless Flash Control:   No
Image Storage
Usable Memory Types: MS PRO Duo / SD / SDHC / SDXC SD / SDHC / SDXC
UHS Support:   UHS-II
Other Memory:    
Dual Card Slots: No Yes
RAW Capture Support: Yes Yes
Uncompressed Format: RAW (12-bit ARW 2.3), RAW+JPEG RAW, RAW + JPEG
Movie File Format: AVCHD 2.0/MP4 (Audio: Dolby Digital (AC-3)/MPEG-4 AAC-LC) MP4, AVCHD, AVCHD Progressive
Included Memory:   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 Yes
External Connections: USB 2.0 High Speed USB 2.0 High Speed,USB 3.0 Super Speed,Bluetooth,WiFi
PictBridge Compliant: Yes Yes
DPOF Compliant: Yes Yes
Remote Control: Yes Yes
Remote Control Type: Optional Wireless or Wired Wi-Fi/Bluetooth or optional wired
Connections (extended): Type-C Mini HDMI (BRAVIA Sync, PhotoTV HD); Wired Remote Terminal, 3.5mm External Stereo Micophone Jack, DC Input USB 3.0 Micro B, HDMI Type-A, 2.5mm Wired Remote, 3.5mm External Mic Jack, 3.5mm Headphone Jack
Performance Timing
Cycle time for JPEG shooting in single shot mode (seconds per frame, max resolution):   <0.3
Cycle time for RAW shooting in single shot mode (seconds per frame):    
Buffer size for RAW shooting in single shot mode (frames):    
Cycle time for RAW+JPEG shooting in single shot mode (seconds per shot):   <0.3
Camera penalizes early shutter press? No
JPEG shooting speed in burst mode (fps, max resolution): 10.0 60.0
Buffer size for JPEG shooting in burst mode (frames, max resolution): 25 50
RAW shooting speed in burst mode (fps):   60.0
Buffer size for RAW shooting in burst mode (frames):   50
RAW+JPEG shooting speed in burst mode (fps):   60.0
Buffer Size for RAW+JPEG shooting in burst mode (frames):   50
Shutter lag (full AF, wide/mid):   0.12 seconds
Shutter lag (full AF, tele):    
Shutter lag (full AF, live view - DSLR):    
Shutter lag (prefocused, live view - DSLR):    
Shutter Lag (manual focus):   0.051 seconds
Shutter lag (full AF, with flash):    
Shutter Lag (prefocused):   0.045 seconds
Shutter Lag (notes):    
Startup Time:   0.9 seconds
Play -> Record Time:   0.7 seconds
Flash cycle time, full power:    
Power
Battery Life, Stills (CIPA Rating Monitor/Live View):   400 shots
Battery Life, Still (CIPA Rating OVF/EVF): 550 shots 380 shots
Battery Life, Video:   55 minutes
Battery Form Factor: Proprietary Proprietary
Usable Battery Types: NP-FM500H Lithium-ion rechargeable 7.2v, 1860mAh Lithium-ion rechargeable
Batteries Included: 1 x Proprietary NP-FM500H Lithium-ion rechargeable 1 x Proprietary Lithium-ion rechargeable
Battery Charger Included (dedicated charger or AC/USB adapter): Yes Yes
Dedicated Battery Charger Included: Yes Yes
Internal Charging Supported: No Yes
Software
Included Software: Sony Software CD-ROM None; Free downloads: PHOTOfunSTUDIO, SILKYPIX Developer Studio
OS Compatibility: Windows XP SP3/Vista SP2/7, Mac OS X (v.10.3 +) PHOTOfunSTUDIO (Windows); SILKYPIX Developer Studio (Windows / Mac)
Miscellaneous
Notes & Features: SteadyShot INSIDE Sensor-shift Image Stabilization (up to 4.5 EV correction), Full HD 1080p60 Video, Up to 12 fps Burst Mode (Tele-zoom Continuous Advance Priority AE), Enhanced Object Tracking AF, 2x Clear Image Digital Zoom, New Auto Portrait Framing, Tilting 921K-dot LCD, 1.44M-dot EVF.