• 35mm 855.6mm2
  • 24.3 megapixels
  • ISO 100 - 25,600
  • APS-C 366.6mm2
  • 24.4 megapixels
  • ISO 100 - 51,200
  • Detailed specifications
  • Sony Alpha SLT-A99
  • Pentax K-3
Links
Prices:   Compare Prices
Manufacturer URL: Manufacturer website Manufacturer website
Predecessor:    
Successor: Sony A99 II
A99 vs A99 II
Pentax K-3 II
K-3 vs K-3 II
General
Model Number: A99 K-3
Alternate Model Number(s): SLT-A99V  
Camera Format: SLR Pro SLR
Currently Manufactured: No No
Retail Price: $2799.99 $1149.95
Street Price: $1,998.00 $699.00
Date Available: 2012-10-15 2013-11-01
Tripod Mount: Yes Yes
Weight: 29.2 oz (828 g)
includes batteries
43.7 oz (1,240 g)
includes batteries, kit lens
Size: 5.8 x 4.4 x 3.1 in.
(147 x 111 x 78 mm)
5.2 x 3.9 x 3.1 in.
(132 x 100 x 77 mm)
Waterproof: No No
Waterproof Depth: n/a n/a
Image Sensor
Sensor Type: CMOS CMOS
Sensor Manufacturer: Sony  
Effective Megapixels: 24.3 24.4
Sensor Format: 35mm APS-C
Sensor size: 855.62mm2 (35.80mm x 23.90mm) 366.6mm2 (23.50mm x 15.60mm)
Approximate Pixel Pitch: 5.97 microns 3.91 microns
Focal Length Multiplier: 1.0x 1.5x
Aspect Ratio: 3:2 3:2
Color Filter Type: RGBG RGBG
Anti Aliasing Filter: Fixed Optional
Self-Cleaning: Yes Yes
Sensor shift image stabilization: Yes Yes
On-Sensor Phase Detect: No No
DxO Sensor Score: 89 80
DxO Color Depth Score (bits): 25.0 23.7
DxO Dynamic Range Score (evs): 14.0 13.4
DxO Maximum Effective ISO Score (iso): 1,555 1,216
Image Capture
Image Resolution: 6000 x 4000 (24.0 MP, 3:2),
6000 x 3376 (20.3 MP, 16:9),
3936 x 2624 (10.3 MP, 3:2),
3936 x 2216 (8.7 MP, 16:9),
2640 x 1760 (4.6 MP, 3:2),
2640 x 1488 (3.9 MP, Other),
1728 x 1152 (2.0 MP, 3:2),
1728 x 976 (1.7 MP, Other),
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)
6016 x 4000 (24.1 MP, 3:2),
4608 x 3072 (14.2 MP, 3:2),
3072 x 2048 (6.3 MP, 3:2),
1920 x 1280 (2.5 MP, 3:2)
Image File Format: JPEG (EXIF 2.3), 14-bit RAW (ARW 2.3), RAW+JPEG JPEG (EXIF 2.30), 14-bit RAW (.PEF, .DNG), RAW+JPEG
Continuous-mode frames/second: 5.9 7.1
Video Capture
Can take movies: Yes Yes
Movie Resolution: 1920x1080 (60p/​28Mbps/​PS or 60i/​24Mbps/​FX or 60i/​17Mbps/​FH or 24p/​24Mbps/​FX or 24p/​17Mbps/​FH)
1440x1080 (30p/​12Mbps)
640x480 (30p/​3Mbps)
1920x1080 (60i/​50i/​30p/​25p/​24p)
1280x720 (60p/​50p/​30p/​25p/​24p)
Movie File Format: AVCHD 2.0 / MP4; Audio :Dolby Digital (AC-3) / MPEG-4 AAC-LC MPEG-4 AVC/H.264 (MOV), Motion JPEG (AVI) for interval movie record
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) Pentax K (KA/KAF/KAF2/3)
Lens: n/a smc Pentax 18-135mm f/3.5-5.6 ED AL [IF] DC DA WR
Focal Length (35mm equivalent):   27 - 203mm
Focal Length (actual):   18 - 135mm
Zoom Ratio:   7.50x
Aperture Range:   f/3.5 - f/22 (wide) / f/5.6 - f/40 (tele)
Integrated ND Filter: No No
Normal Focus Range:   40 cm to Infinity
15.7 in to Infinity
Macro Focus Range:    
Filter Thread: n/a 62.0mm
Thread Type: n/a n/a
Optical Image Stabilization: No No
Digital Zoom: Yes
Digital Zoom Values: 1.4x / 2x  
Auto Focus
Auto Focus: Yes Yes
Auto Focus Type: Dual Phase-detection: 19 points (11 points cross type) CCD line sensors, 102 assist points focal plane phase-detection sensors; Wide (auto, 19 points), Zone, Spot, Local selectable SAFOX 11 TTL phase-matching - 27 point (25 cross type focus points in the center)
Auto Focus Assist Light? Yes Yes
Manual Focus: Yes Yes
Viewfinder
Viewfinder: EVF / LCD Optical / LCD
Viewfinder Type: EVF type; 1.3cm (0.5-inch) 2,359K-dot XGA OLED, ~100% coverage, 0.71x magnification, 22mm eyepoint at -1 diopter (CIPA standard), -4 to +3 diopter, eye sensor. SLR type; eye-level pentaprism, ~100% coverage, 0.95x mag., TBDmm eyepoint, -2.5 to +1.5 diopter
Focus Peaking: Yes Yes
EVF Resolution: 2,359,000 dots n/a
Viewfinder Magnification (35mm equivalent): 0.71x 0.63x
Viewfinder Magnification (nominal/claimed): 0.71x 0.95x
Display
Eye-level Viewfinder: Yes Yes
Rear Display: Yes Yes
Rear Display Size (inches): 3.0 3.2
Rear Display Resolution: 1,228,800 dots (307,200 px) 1,036,800 dots (345,600 px)
Touchscreen: No No
Articulating Screen: Yes No
Tilt Swivel Screen: Yes No
Selfie Screen: Yes No
Max Playback Zoom: 16.7x 16.0x
Top Deck Display: Yes Yes
Exposure
Maximum ISO (native): 25600 51200
Minimum ISO (native): 100 100
ISO Settings: Auto (100-6400 with selectable limits), 100-25600 in 1/3 EV steps, extendable down to ISO 50; Multi-frame NR up to ISO 51200 Auto, 100-51200 (1, 1/2 or 1/3 EV steps)
Auto ISO Mode: Yes Yes
White Balance Settings: Auto WB, Daylight, Shade, Cloudy, Incandescent, Fluorescent (Warm white/Cool white/Day white/Daylight), Flash, C. Temp 2500 to 9900K, C Filter G7 to M7 (15-step), Custom, AWB micro adjustment Auto, Multi Auto WB, Daylight, Shade, Cloudy, Fluorescent Light (D: Daylight Color, N:Daylight White, W:Cool White, L:Warm White), Tungsten Light, Flash, CTE, Manual (up to 3 settings), Color Temperature (up to 3 settings)
Shutter Speed Range: 1/8000 - 30 sec 1/8000 - 30 sec
Bulb Mode: Yes Yes
Exposure Compensation: +/- 5.0EV in 0.3EV steps +/- 5.0EV in 0.3EV steps
Metering Modes: 1200-zone Evaluative, Center-weighted, Spot TTL open-aperture: Multi-segment with 86K-pixel RGB sensor, 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, Landscape, Macro, Sports Action, Sunset, Night Portrait, Night Scene, Hand-held Twilight, Sweep Panorama, Telezoom Continuous Priority AE Sensitivity Priority, Shutter and Aperture Priority; Digital filters (capture): Extract Color, Toy Camera, Retro, High Contrast, Shading, Invert Color, Unicolor Bold, Bold Monochrome; HDR: Auto, HDR1, HDR2, HDR3.
Self Timer: 2, 10; 3 or 5 frames after 10s seconds 2 or 12 seconds
Time Lapse (intervalometer):   Yes
High Resolution Composite: No No
Flash
Built-in Flash: No Yes
Flash Modes: Auto, Off, Fill-flash, Rear sync, Wireless, High-Speed sync, Slow sync, Red-eye reduction: On/Off P-TTL, Red-eye reduction, Slow-speed sync, Rear Curtain Sync. High-Speed Sync and Wireless Sync also available with PENTAX dedicated external flash.
Flash Guide Number (ISO 100): n/a 13.0 m / 42.7 ft.
Flash Range Description: n/a Depends on lens
Max Flash Sync: 1/250 1/180
Flash Exposure Compensation: +/- 3.0 EV in 0.3EV steps -2 to +1 EV in 0.5EV steps
External Flash Connection: Multi Interface Shoe, PC-Sync terminal Hot Shoe, PC Sync socket
Built-In Wireless Flash Control:   Full TTL exposure
Image Storage
Usable Memory Types: MS Duo / MS PRO Duo / SD / SDHC / SDXC SD / SDHC / SDXC
UHS Support: UHS-I UHS-I
Other Memory:    
Dual Card Slots: Yes Yes
RAW Capture Support: Yes Yes
Uncompressed Format: 14-bit RAW (ARW 2.3), RAW+JPEG 14-bit RAW (.PEF, .DNG), RAW+JPEG
Movie File Format: AVCHD 2.0 / MP4; Audio :Dolby Digital (AC-3) / MPEG-4 AAC-LC MPEG-4 AVC/H.264 (MOV), Motion JPEG (AVI) for interval movie record
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: Yes No
Microphone Jack: Yes Yes
Headphone Jack: Yes Yes
External Connections: USB 2.0 High Speed USB 3.0 Super Speed
PictBridge Compliant: Yes No
DPOF Compliant: Yes Yes
Remote Control: Yes Yes
Remote Control Type: Optional Wireless or Wired Optional Wired or IR
Connections (extended): Type-C HDMI Mini Connector (BRAVIA Sync, PhotoTV H); Wired Remote Terminal, External Stereo Micophone Jack, External Stereo Headphone Jack, DC Input, Vertical Grip connector, Sync Terminal, Multi Interface Shoe, Built-in GPS Micro (Type D) HMDI, USB 3.0 Micro B, DC input, wired remote jack, 3.5mm external stereo mic jack, 3.5mm stereo headphone jack
Performance Timing
Cycle time for JPEG shooting in single shot mode (seconds per frame, max resolution): 0.50 0.79
Cycle time for RAW shooting in single shot mode (seconds per frame): 0.56 0.64
Buffer size for RAW shooting in single shot mode (frames): Unlimited Unlimited
Cycle time for RAW+JPEG shooting in single shot mode (seconds per shot): 0.58 0.69
Camera penalizes early shutter press? No No
JPEG shooting speed in burst mode (fps, max resolution): 5.9 7.1
Buffer size for JPEG shooting in burst mode (frames, max resolution): 17 75
RAW shooting speed in burst mode (fps): 5.9 7.1
Buffer size for RAW shooting in burst mode (frames): 18 24
RAW+JPEG shooting speed in burst mode (fps): 5.9 7.1
Buffer Size for RAW+JPEG shooting in burst mode (frames): 13 25
Shutter lag (full AF, wide/mid): 0.13 seconds 0.14 seconds
Shutter lag (full AF, tele):    
Shutter lag (full AF, live view - DSLR):   1.01 seconds
Shutter lag (prefocused, live view - DSLR):   0.226 seconds
Shutter Lag (manual focus): 0.081 seconds 0.097 seconds
Shutter lag (full AF, with flash):   0.33 seconds
Shutter Lag (prefocused): 0.055 seconds 0.096 seconds
Shutter Lag (notes): Full AF lag, Wide-area AF mode = 0.125s Prefocused shutter lag with Electronic First Curtain Off = 0.108s Full AF lag, Wide-area mode, OVF = 0.157s Live View: Center mode AF lag = 1.014s Wide-area mode AF lag = 1.005s Prefocused = 0.226s
Startup Time: 0.7 seconds 0.9 seconds
Play -> Record Time: 1.1 seconds 0.6 seconds
Flash cycle time, full power:   2.3 seconds
Power
Battery Life, Stills (CIPA Rating Monitor/Live View): 500 shots  
Battery Life, Still (CIPA Rating OVF/EVF): 410 shots 560 shots
Battery Life, Video:    
Battery Form Factor: Proprietary NP-FM500H Proprietary D-LI90
Usable Battery Types: Lithium-ion rechargeable Lithium-ion rechargeable
Batteries Included: 1 x Proprietary NP-FM500H Lithium-ion rechargeable 1 x Proprietary D-LI90 Lithium-ion rechargeable
Battery Charger Included (dedicated charger or AC/USB adapter): Yes Yes
Dedicated Battery Charger Included: Yes Yes
Internal Charging Supported: No No
Software
Included Software: Software CD-ROM (includes Picture Motion Browser, Image Data Converter 4, Remote Camera Control 3) Software CD-ROM S-SW140
OS Compatibility: Windows XP SP3/Vista SP2/7, Mac OS X (v.10.5 +); PMB is Windows only  
Miscellaneous
Notes & Features: 24.3MP full-frame image sensor, SteadyShot INSIDE image stabilization, dual phase-detect AF, 200K shutter, AVCHD 2.0 video, hi-res OLED EVF, articulating 1.3M-dot LCD, 6 fps bursts at full resolution, up to 10 fps Tele-zoom mode, two card slots (SD/MS, SD), real-time Full HD video out via HDMI, built-in GPS. Image stabilization system also acts as a selectable AA filter, 8.3 fps full-res burst mode, new 27-point AF system, new 86,000 pixel RGB metering system, Full HD video up to 60i with H.264 encoding, dual SD card slots, freeze-proof, dust-proof, weather-resistant magnesium alloy construction, USB 3.0 port.