• 35mm 861.6mm2
  • 24.6 megapixels
  • ISO 200 - 3200
  • 1/2.3 inch 28.1mm2
  • 14.0 megapixels
  • 28.00mm - 140.00mm (35mm eq.)
  • Detailed specifications
  • Sony Alpha DSLR-A900
  • Pentax Optio S1
Links
Prices:    
Manufacturer URL: Manufacturer website Manufacturer website
Predecessor:    
Successor:    
General
Model Number: A900 S1
Alternate Model Number(s):    
Camera Format: Pro SLR Ultra Compact
Currently Manufactured: No No
Retail Price: $2999.99 $199.95
Street Price:    
Date Available: 2008-11-15 2011-03-15
Tripod Mount: Yes Yes
Weight: 33.1 oz (939 g)
includes batteries
4.4 oz (125 g)
includes batteries
Size: 6.2 x 4.6 x 3.2 in.
(156 x 117 x 82 mm)
3.6 x 2.1 x 0.8 in.
(92 x 54 x 21 mm)
Waterproof: No No
Waterproof Depth: n/a n/a
Image Sensor
Sensor Type: CMOS CCD
Sensor Manufacturer: Sony  
Effective Megapixels: 24.6 14.0
Sensor Format: 35mm 1/2.3 inch
Sensor size: 861.6mm2 (35.90mm x 24.00mm) 28.0735mm2 (6.17mm x 4.55mm)
Approximate Pixel Pitch: 5.94 microns 1.44 microns
Focal Length Multiplier: 1.0x n/a
Aspect Ratio: 3:2, 16:9 4:3
Color Filter Type: RGBG RGBG
Anti Aliasing Filter: Fixed  
Self-Cleaning: Yes No
Sensor shift image stabilization: Yes Yes
On-Sensor Phase Detect: No No
DxO Sensor Score: 79  
DxO Color Depth Score (bits): 23.7  
DxO Dynamic Range Score (evs): 12.3  
DxO Maximum Effective ISO Score (iso): 1,431  
Image Capture
Image Resolution: 6048 x 4032 (24.4 MP, 3:2),
6048 x 3408 (20.6 MP, Other),
4400 x 2936 (12.9 MP, 3:2),
4400 x 2472 (10.9 MP, 16:9),
3984 x 2656 (10.6 MP, 3:2),
3024 x 2016 (6.1 MP, 3:2),
2896 x 1928 (5.6 MP, 3:2),
3024 x 1704 (5.2 MP, Other),
1984 x 1320 (2.6 MP, 3:2)
4288 x 3216 (13.8 MP, 4:3),
3216 x 3216 (10.3 MP, 1:1),
4224 x 2376 (10.0 MP, 16:9),
3072 x 2304 (7.1 MP, 4:3),
1600 x 1200 (1.9 MP, 4:3),
640 x 480 (0.3 MP, 4:3)
Image File Format: JPEG (EXIF 2.21), RAW, cRAW, RAW+JPEG; (ARW 2.0) JPEG (Exif 2.3)
Continuous-mode frames/second: 5.0 n/a
Video Capture
Can take movies: No Yes
Movie Resolution: 1280x720 (30/​15)
640x480 (30/​15)
320x240 (30/​15)
Movie File Format:   AVI (Motion JPEG)
Composite Video Out: Yes Yes
NTSC/PAL Switchable Video: Yes Yes
Video Usable as Viewfinder: No
HD Video Out: Yes
HD Video Connection: HDMI
Lens & Optics
Lens Mount: Sony Alpha (Minolta A) n/a
Lens: n/a Pentax zoom lens, 9 elements in 8 groups, 4 aspheric elements
Focal Length (35mm equivalent):   28 - 140mm
Focal Length (actual):   5 - 25mm
Zoom Ratio:   5.00x
Aperture Range:   f/3.9 (wide) / f/5.7 (tele) - ???
Integrated ND Filter: No No
Normal Focus Range:   40 cm to Infinity
15.7 in to Infinity
Macro Focus Range:   1 - 30 cm
0.4 - 11.8 in
Filter Thread: n/a n/a
Thread Type: n/a n/a
Optical Image Stabilization: No No
Digital Zoom: No Yes
Digital Zoom Values: n/a Up to 7x; Intelligent Zoom up to 33.5x at VGA
Auto Focus
Auto Focus: Yes Yes
Auto Focus Type: 9-point TTL phase detection with 10 assist points, center dual-cross at f/2.8. 9-point Contrast Detection with face detection, spot, pan, and auto tracking modes
Auto Focus Assist Light? Yes No
Manual Focus: Yes Yes
Viewfinder
Viewfinder: Optical / LCD (playback only) LCD
Viewfinder Type: SLR type; eye-level pentaprism with 100% coverage, 0.74x mag., 20mm eyepoint, -3 to +1 diopter  
Focus Peaking: No No
EVF Resolution: n/a n/a
Viewfinder Magnification (35mm equivalent): 0.74x  
Viewfinder Magnification (nominal/claimed): 0.74x  
Display
Eye-level Viewfinder: Yes No
Rear Display: Yes Yes
Rear Display Size (inches): 3.0 2.7
Rear Display Resolution: 921,600 dots 230,000 dots
Touchscreen: No No
Articulating Screen: No No
Tilt Swivel Screen: No No
Selfie Screen: No No
Max Playback Zoom: 19.0x  
Top Deck Display: Yes
Exposure
Maximum ISO (native): 3200  
Minimum ISO (native): 200  
ISO Settings: Auto, 200-3200, Extensions to 100 and 6400 Auto: TBD, Manual: TBD
Auto ISO Mode: Yes Yes
White Balance Settings: Auto, Daylight, Shade, Cloudy, Tungsten, Fluorescent, Flash, Color Temperature from 2,500K to 9,900K, Custom (3) Auto, Daylight, Shade, Tungsten, Fluorescent , Manual
Shutter Speed Range: 1/8000 - 30 sec 1/1600 - 4 sec
Bulb Mode: Yes No
Exposure Compensation: +/- 3.0EV in 0.3EV steps +/- 2.0EV in 0.3EV steps
Metering Modes: 40-segment Honeycomb Pattern, Center-weighted, Spot Multi-segment, Center-weighted, Spot
Program Auto Exposure: Yes Yes
Aperture Priority: Yes No
Shutter Priority: Yes No
Full Manual Exposure: Yes No
Creative Exposure Modes:   Auto Picture (Landscape, Portrait, Night Scene, Night Scene Portrait, Standard, Flower, Sport, Candlelight, Blue Sky, Sunset, Text, Group Photo, Portrait x Blue Sky, Portrait x Sunset, Portrait x Backlight), Blue Sky, Landscape, Flower, Sunset, Night Scene, Night Scene Portrait, Portrait, Natural Skin Tone, Food, Digital SR, Kids, Pet, Sport, Surf & Snow, Fireworks, Frame Composite, Party, Candlelight, Text, Miniature, HDR
Self Timer: 2 or 10 seconds 2 or 10 seconds
Time Lapse (intervalometer):    
High Resolution Composite: No No
Flash
Built-in Flash: No Yes
Flash Modes: n/a Auto, Flash Off, Flash On, Auto + Redeye, On + Redeye
Flash Guide Number (ISO 100): n/a n/a
Flash Range Description: n/a 12 ft (wide, auto ISO), 8.2 ft (tele, auto ISO)
Max Flash Sync: 1/250  
Flash Exposure Compensation: +/- 3.0 EV in 0.3EV steps  
External Flash Connection: Hot shoe, PC-sync n/a
Built-In Wireless Flash Control:    
Image Storage
Usable Memory Types: CF1 / CF2 / MS Duo / MS PRO Duo / Microdrive SD / SDHC / SDXC
UHS Support:    
Other Memory:    
Dual Card Slots: Yes No
RAW Capture Support: Yes No
Uncompressed Format: RAW, cRAW, RAW+JPEG; (ARW 2.0)  
Movie File Format:   AVI (Motion JPEG)
Included Memory:   0.0 MB
Included Memory Type:    
Connectivity
Built-In Wi-Fi: No No
NFC: No
Bluetooth: No No
Built-In GPS: No No
Microphone Jack: No No
Headphone Jack: No No
External Connections: USB 2.0 High Speed USB 2.0 High Speed
PictBridge Compliant: Yes No
DPOF Compliant: Yes Yes
Remote Control: Yes Yes
Remote Control Type: Wired or wireless Optional IR
Connections (extended): DC input, Multi-connector, Sync termimal, Remote terminal, HDMI Type-C minijack  
Performance Timing
Cycle time for JPEG shooting in single shot mode (seconds per frame, max resolution): 0.40  
Cycle time for RAW shooting in single shot mode (seconds per frame): 0.41  
Buffer size for RAW shooting in single shot mode (frames): 15  
Cycle time for RAW+JPEG shooting in single shot mode (seconds per shot):    
Camera penalizes early shutter press? No
JPEG shooting speed in burst mode (fps, max resolution): 5.0  
Buffer size for JPEG shooting in burst mode (frames, max resolution): 11  
RAW shooting speed in burst mode (fps):    
Buffer size for RAW shooting in burst mode (frames):    
RAW+JPEG shooting speed in burst mode (fps):    
Buffer Size for RAW+JPEG shooting in burst mode (frames):    
Shutter lag (full AF, wide/mid): 0.18 seconds  
Shutter lag (full AF, tele):    
Shutter lag (full AF, live view - DSLR):    
Shutter lag (prefocused, live view - DSLR):    
Shutter Lag (manual focus): 0.153 seconds  
Shutter lag (full AF, with flash):    
Shutter Lag (prefocused): 0.072 seconds  
Shutter Lag (notes):    
Startup Time: 0.5 seconds  
Play -> Record Time: 0.3 seconds  
Flash cycle time, full power:    
Power
Battery Life, Stills (CIPA Rating Monitor/Live View):    
Battery Life, Still (CIPA Rating OVF/EVF): 880 shots  
Battery Life, Video:    
Battery Form Factor: Proprietary Proprietary D-LI78
Usable Battery Types: NP-FM500H Lithium-ion rechargeable Lithium-ion rechargeable
Batteries Included: 1 x Proprietary NP-FM500H Lithium-ion rechargeable 1 x Proprietary D-LI78 Lithium-ion rechargeable
Battery Charger Included (dedicated charger or AC/USB adapter): Yes Yes
Dedicated Battery Charger Included:
Internal Charging Supported:
Software
Included Software: Image Data Converter SR, Image Data Lightbox SR, Remote Camera Control (all Windows & Macintosh), Picture Motion Browser (Windows only). Pentax Software CDROM
OS Compatibility: Windows 2000Pro/XP/Vista; Mac OS X (v 10.1.3+)  
Miscellaneous
Notes & Features: 24.6MP Full-frame CMOS sensor, In-body SteadyShot Image Stabilization, Intelligent Preview, Enhanced DRO, Magnesium-alloy Body, Dust/Moisture Resistance, 100K Shutter, 3 User Programmable Memory Modes, AF Micro-adjustment, Top Mounted LCD, Quick Navigation system, Custom button, PhotoTV HD output via HDMI optimized for Sony Bravia TVs. Sensor-shift Shake Reduction (SR), 720p HD movies, Auto Picture mode detects 14 scene types, Face Detection, Smile Capture, Blink Detection, High Dynamic Range (HDR) mode, 9 digital filters, optional IR remote, in-body recharge system. Available in chrome, black or green finishes.