• APS-C 366.6mm2
  • 20.1 megapixels
  • ISO 100 - 16,000
  • APS-C 372.1mm2
  • 16.3 megapixels
  • ISO 100 - 51,200
  • Detailed specifications
  • Sony Alpha SLT-A58
  • Pentax K-50
Links
Prices:   Compare Prices
Manufacturer URL: Manufacturer website Manufacturer website
Predecessor:   Pentax K-30
K-30 vs K-50
Successor: Sony A68
A58 vs A68
Pentax K-70
K-50 vs K-70
General
Model Number: A58 K-50
Alternate Model Number(s):    
Camera Format: SLR SLR
Currently Manufactured: No No
Retail Price: $600.00 $779.95
Street Price: $598.00 $149.00
Date Available: 2013-04-15 2013-07-15
Tripod Mount: Yes Yes
Weight: 25.8 oz (731 g)
includes batteries, kit lens
31.9 oz (904 g)
includes batteries, kit lens
Size: 5.1 x 3.8 x 3.1 in.
(129 x 96 x 78 mm)
5.1 x 3.8 x 2.8 in.
(130 x 97 x 71 mm)
Waterproof: No No
Waterproof Depth: n/a n/a
Image Sensor
Sensor Type: CMOS CMOS
Sensor Manufacturer: Sony Sony
Effective Megapixels: 20.1 16.3
Sensor Format: APS-C APS-C
Sensor size: 366.6mm2 (23.50mm x 15.60mm) 372.09mm2 (23.70mm x 15.70mm)
Approximate Pixel Pitch: 4.31 microns 4.81 microns
Focal Length Multiplier: 1.5x 1.5x
Aspect Ratio: 3:2 3:2
Color Filter Type: RGBG RGBG
Anti Aliasing Filter: Fixed Fixed
Self-Cleaning: Yes Yes
Sensor shift image stabilization: Yes Yes
On-Sensor Phase Detect: No No
DxO Sensor Score: 74 79
DxO Color Depth Score (bits): 23.3 23.7
DxO Dynamic Range Score (evs): 12.5 13.0
DxO Maximum Effective ISO Score (iso): 753 1,120
Image Capture
Image Resolution: 5456 x 3632 (19.8 MP, 3:2),
5456 x 3064 (16.7 MP, 16:9),
3872 x 2576 (10.0 MP, 3:2),
3872 x 2176 (8.4 MP, 16:9),
2736 x 1824 (5.0 MP, 3:2),
2736 x 1536 (4.2 MP, 16:9),
12416 x 1856 (23.0 MP, Other),
8192 x 1856 (15.2 MP, Other),
2160 x 5536 (12.0 MP, Other),
2160 x 3872 (8.4 MP, Other)
4928 x 3264 (16.1 MP, Other),
4224 x 2816 (11.9 MP, 3:2),
3456 x 2304 (8.0 MP, 3:2),
2688 x 1792 (4.8 MP, 3:2)
Image File Format: JPEG, RAW (12-bit ARW 2.3), RAW+JPEG JPEG (EXIF 2.3), 12-bit RAW (.DNG), RAW+JPEG
Continuous-mode frames/second: 4.9 6.0
Video Capture
Can take movies: Yes Yes
Movie Resolution: 1920x1080 (60i or 24p (24/​17Mbps))
1440x1080 (30p/​12Mbps)
640x480 (30p/​3Mbps)
1920x1080 (30p/​25p/​24p)
1280x720 (60p/​50p/​30p/​25p/​24p)
640x480 (30p/​25p/​24p)
Movie File Format: AVCHD / MP4; Audio: Dolby Digital (AC-3)/MPEG-4 AAC-LC, stereo MOV MPEG-4 AVC (H.264) with monaural audio
Composite Video Out: No Yes
NTSC/PAL Switchable Video: n/a Yes
Video Usable as Viewfinder: n/a No
HD Video Out: Yes No
HD Video Connection: HDMI
Lens & Optics
Lens Mount: Sony Alpha (Minolta A) Pentax K (KA/KAF/KAF2/3)
Lens: Sony 18-55mm f/3.5-5.6 DT SAM smc PENTAX-DA L 18-55mm f/3.5-5.6 AL WR; 11 elements in 8 groups, 6 bladed diaphragm
Focal Length (35mm equivalent): 27 - 83mm 27 - 83mm
Focal Length (actual): 18 - 55mm 18 - 55mm
Zoom Ratio: 3.06x 3.06x
Aperture Range: f/3.5 - 22 (W), f/5.6 - 36 (T) f/3.5 - f/22 (wide) / f/5.6 - f/38 (tele)
Integrated ND Filter: No No
Normal Focus Range: 25 cm to Infinity
9.8 in to Infinity
25 cm to Infinity
9.8 in to Infinity
Macro Focus Range:    
Filter Thread: 55.0mm 52.0mm
Thread Type: n/a n/a
Optical Image Stabilization: No No
Digital Zoom: Yes No
Digital Zoom Values: Up to 4x; up to 2x Clear Image Digital Zoom n/a
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; Eye Start AF Phase Detect:: SAFOX IXi+, 11 point (9 cross type focus point in the center), with light wavelength sensor and diffraction lens; Live View: Contrast detection AF (face detection, tracking, select, spot)
Auto Focus Assist Light? Yes Yes
Manual Focus: Yes Yes
Viewfinder
Viewfinder: EVF / LCD Optical / LCD
Viewfinder Type: EVF type; 1/2-inch, 1.44M-dot OLED Tru-Finder, 100% coverage, 0.88x magnification (0.57x 35mm eq.), 26.5mm from the eyepiece lens / 23mm from the eyepiece frame eye point, -4.0 to +4.0 diopter SLR type; eye-level pentaprism, 100% coverage, 0.92x mag., -2.5 to +1.5 diopter, Natural-Bright-Matte III focusing screen (interchangeable)
Focus Peaking: Yes Yes
EVF Resolution: 1,440,000 dots n/a
Viewfinder Magnification (35mm equivalent): 0.57x 0.61x
Viewfinder Magnification (nominal/claimed): 0.88x 0.92x
Display
Eye-level Viewfinder: Yes Yes
Rear Display: Yes Yes
Rear Display Size (inches): 2.7 3.0
Rear Display Resolution: 460,800 dots (153,600 px) 921,600 dots (307,200 px)
Touchscreen: No No
Articulating Screen: Yes No
Tilt Swivel Screen: No No
Selfie Screen: No No
Max Playback Zoom: 15.0x 16.0x
Top Deck Display: No No
Exposure
Maximum ISO (native): 16000 51200
Minimum ISO (native): 100 100
ISO Settings: Auto (100-3200), 100, 200, 400, 800, 1600, 3200, 6400, 12800, 16000; (Multi-frame NR mode up to ISO 25600) Auto, 100-51200 (1, 1/2 or 1/3 EV steps)
Auto ISO Mode: Yes Yes
White Balance Settings: Auto, Daylight, Shade, Cloudy, Incandescent, Fluorescent, Flash, Custom, Color Temp./ Filter (2500-9900K with 15-step Magenta/Green compensation) Auto, Daylight, Shade, Cloudy, Fluorescent (D, N, W, L), Tungsten, Flash, CTE, 3 Manual and 3 Kelvin temperature presets
Shutter Speed Range: 1/4000 - 30 sec 1/6000 - 30 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 TTL open-aperture: 77-segment, Center-weighted, Spot
Program Auto Exposure: Yes Yes
Aperture Priority: Yes Yes
Shutter Priority: Yes Yes
Full Manual Exposure: Yes Yes
Creative Exposure Modes: Scene Modes: Portrait, Landscape, Macro, Sports Action, Sunset, Night Portrait, Night View, Handheld Twilight; Picture Effects: 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; Sweep Panorama, Anti Motion Blur, Multi Frame Noise Reduction Sensitivity Priority, Shutter and Aperture Priority, Scene (Portrait, Landscape, Macro, Moving Object, Night Scene Portrait, Sunset, Blue Sky, Forest, Night Scene, Night Scene HDR (JPG), Night Snap, Food, Pet, Kids, Surf & Snow, Backlight Silhouette, Candlelight, Stage Lighting, Museum); Extract Color, Toy Camera, Retro, High Contrast, Shading, Invert Color, Color; Dynamic range adjustment (Highlight, Shadow); HDR: Auto, HDR 1, HDR 2, HDR 3
Self Timer: 2 or 10 seconds 2 or 12 seconds
Time Lapse (intervalometer):   Yes
High Resolution Composite: No No
Flash
Built-in Flash: Yes Yes
Flash Modes: Auto, Fill-flash, Slow Sync., Rear Sync., Hi-speed sync., Red-eye reduction (on/off selectable for Auto flash and fill-flash mode), Wireless, Off P-TTL: On, Redeye, Slow Sync, Slow Sync + Redeye, Trailing Curtain Sync
Flash Guide Number (ISO 100): 10.0 m / 32.8 ft. 12.0 m / 39.4 ft.
Flash Range Description: Lens dependent Depends on lens
Max Flash Sync: 1/160 1/180
Flash Exposure Compensation: +/- 2.0 EV in 0.3EV steps -2 to +1 EV in 0.5EV steps
External Flash Connection: Multi Interface Hot shoe Hot Shoe
Built-In Wireless Flash Control: Full TTL exposure Full TTL exposure
Image Storage
Usable Memory Types: MS PRO Duo / SD / SDHC / SDXC SD / SDHC / SDXC
UHS Support: No UHS support  
Other Memory:    
Dual Card Slots: No No
RAW Capture Support: Yes Yes
Uncompressed Format: RAW (12-bit ARW 2.3), RAW+JPEG 12-bit RAW (.DNG), RAW+JPEG
Movie File Format: AVCHD / MP4; Audio: Dolby Digital (AC-3)/MPEG-4 AAC-LC, stereo MOV MPEG-4 AVC (H.264) with monaural audio
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: Yes No
Headphone Jack: No No
External Connections: USB 2.0 High Speed USB 2.0 High Speed
PictBridge Compliant: No No
DPOF Compliant: Yes Yes
Remote Control: Yes Yes
Remote Control Type: Optional wired RM-VPR1 Optional Wired or IR
Connections (extended): Type-D Micro HDMI, DC Input, 3.5mm Stereo Micophone Jack, Multi/Micro USB (remote) Wired remote port
Performance Timing
Cycle time for JPEG shooting in single shot mode (seconds per frame, max resolution): 0.51  
Cycle time for RAW shooting in single shot mode (seconds per frame): 0.55  
Buffer size for RAW shooting in single shot mode (frames): 2  
Cycle time for RAW+JPEG shooting in single shot mode (seconds per shot): 0.57  
Camera penalizes early shutter press? No
JPEG shooting speed in burst mode (fps, max resolution): 4.9 6.0
Buffer size for JPEG shooting in burst mode (frames, max resolution): 8 30
RAW shooting speed in burst mode (fps): 4.9  
Buffer size for RAW shooting in burst mode (frames): 6  
RAW+JPEG shooting speed in burst mode (fps): 4.9  
Buffer Size for RAW+JPEG shooting in burst mode (frames): 5  
Shutter lag (full AF, wide/mid): 0.13 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): 0.33 seconds  
Shutter Lag (prefocused): 0.054 seconds  
Shutter Lag (notes): Full Autofocus Shutter Lag, Wide-area Mode = 0.139s  
Startup Time: 1.9 seconds  
Play -> Record Time: 1.1 seconds  
Flash cycle time, full power: 2.1 seconds  
Power
Battery Life, Stills (CIPA Rating Monitor/Live View): 700 shots  
Battery Life, Still (CIPA Rating OVF/EVF): 690 shots 480 shots
Battery Life, Video:    
Battery Form Factor: Proprietary Proprietary; optional D-BH109 AA Battery Holder
Usable Battery Types: NP-FM500H Lithium-ion rechargeable D-LI109 Lithium-ion rechargeable
Batteries Included: 1 x Proprietary NP-FM500H Lithium-ion rechargeable 1 x Proprietary D-LI109 Lithium-ion rechargeable
Battery Charger Included (dedicated charger or AC/USB adapter): Yes Yes
Dedicated Battery Charger Included: Yes
Internal Charging Supported: No
Software
Included Software: PlayMemories Home, Image Data Converter 4 Software CDROM (SILKYPIX Developer Studio for PENTAX included)
OS Compatibility: Windows XP SP3/Vista SP2/7 SP1/8; Mac OS X v10.5 or later. (Software is Windows only.)  
Miscellaneous
Notes & Features: New 20.1MP Exmor APS HD CMOS sensor, SteadyShot INSIDE image stabilization, 2.7" 406K-dot tilting LCD, OLED Tru-Finder EVF, 5fps full-resolution burst mode (up to 8fps in Tele-zoom Continuous Advance Priority AE mode), new Lock-on autofocus, Full HD 1080i60 movies, Multi Interface Hot Shoe, new area-specific noise reduction. U.S. availability and pricing TBD. Replaces K-30: tweaked 16MP sensor, tweaked PRIME M processor, maximum ISO now 51,200, controllable Eye-Fi connection, new WR L kit lenses. Available in 120 colors (20 base colors, 6 grip colors).