• 1/1.7 inch 43.3mm2
  • 12.0 megapixels
  • 37.00mm - 111.00mm (35mm eq.)
  • 1 inch 115.3mm2
  • 14.2 megapixels
  • ISO 200 - 12,800
  • Detailed specifications
  • Pentax Optio A40
  • Nikon S2
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Manufacturer URL: Manufacturer website Manufacturer website
Predecessor:    
Successor:    
General
Model Number: A40 S2
Alternate Model Number(s):    
Camera Format: Ultra Compact Compact System Camera
Currently Manufactured: No No
Retail Price: $299.95 $449.95
Street Price:   $399.00
Date Available: 2008-02-15 2014-06-15
Tripod Mount: Yes Yes
Weight: 5.3 oz (150 g)
includes batteries 		6.7 oz (190 g)
Size: 3.6 x 2.2 x 0.9 in.
(91 x 56 x 23 mm) 		4.0 x 2.4 x 1.2 in.
(101 x 61 x 29 mm)
Waterproof: No No
Waterproof Depth: n/a n/a
Image Sensor
Sensor Type: CCD CMOS
Sensor Manufacturer:   Aptina
Effective Megapixels: 12.0 14.2
Sensor Format: 1/1.7 inch 1 inch
Sensor size: 43.32mm2 (7.6mm x 5.7mm) 115.28mm2 (13.10mm x 8.80mm)
Approximate Pixel Pitch: 1.90 microns 2.85 microns
Focal Length Multiplier: n/a 2.7x
Aspect Ratio: 4:3 3:2
Color Filter Type: RGBG RGBG
Anti Aliasing Filter:   Fixed
Self-Cleaning: No No
Sensor shift image stabilization: Yes No
On-Sensor Phase Detect: No Yes
DxO Sensor Score:    
DxO Color Depth Score (bits):    
DxO Dynamic Range Score (evs):    
DxO Maximum Effective ISO Score (iso):    
Image Capture
Image Resolution: 4000 x 3000 (12.0 MP, 4:3),
3648 x 2736 (10.0 MP, 4:3),
3072 x 2304 (7.1 MP, 4:3),
2592 x 1944 (5.0 MP, 4:3),
2048 x 1536 (3.1 MP, 4:3),
1024 x 768 (0.8 MP, 4:3),
640 x 480 (0.3 MP, 4:3) 		4592 x 3072 (14.1 MP, Other),
3440 x 2296 (7.9 MP, 3:2),
2288 x 1528 (3.5 MP, 3:2)
Image File Format: JPEG (EXIF 2.2) JPEG (Exif 2.3), 12-bit NEF RAW
Continuous-mode frames/second: n/a 60.0
Video Capture
Can take movies: Yes Yes
Movie Resolution: 640x480 (30)
320x240 (30) 		1920x1080 (60p/​30p)
1280x720 (60p/​30p)
768x288 (400p)
416x144 (1200p)
Movie File Format: AVI (DivX MPEG-4) MOV H.264/MPEG-4 AVC with AAC sound
Composite Video Out: Yes No
NTSC/PAL Switchable Video: Yes n/a
Video Usable as Viewfinder: n/a
HD Video Out: Yes
HD Video Connection: HDMI
Lens & Optics
Lens Mount: n/a Nikon 1
Lens: SMC Pentax Zoom (7 elements in 5 groups, 3 aspherical) 1 Nikkor 11-27.5mm f/3.5-5.6
Focal Length (35mm equivalent): 37 - 111mm 30 - 74mm
Focal Length (actual): 7.9 - 23.7mm 11 - 27.5mm
Zoom Ratio: 3.00x 2.50x
Aperture Range: f/2.8 (wide) - f/5.4 (tele) - ??? f/3.5 (W) / f/5.6 (T) - f/16
Integrated ND Filter: No No
Normal Focus Range: 35 cm to Infinity
13.8 in to Infinity 		30 cm to Infinity
11.8 in to Infinity
Macro Focus Range: 6 - 40 cm
2.4 - 15.7 in 		 
Filter Thread: n/a 40.5mm
Thread Type: n/a n/a
Optical Image Stabilization: No No
Digital Zoom: Yes No
Digital Zoom Values: Up to 6x n/a
Auto Focus
Auto Focus: Yes Yes
Auto Focus Type: 5 point Contrast Detect AF; spot, tracking, and face recognition Hybrid autofocus (phase detection/contrast-detect AF); Single-point (135 focus areas, center 73 support phase-detect), auto-area (41 focus areas), subject tracking
Auto Focus Assist Light? Yes Yes
Manual Focus: Yes Yes
Viewfinder
Viewfinder: LCD No / LCD
Viewfinder Type:    
Focus Peaking: No No
EVF Resolution: n/a n/a
Viewfinder Magnification (35mm equivalent):    
Viewfinder Magnification (nominal/claimed):    
Display
Eye-level Viewfinder: No No
Rear Display: Yes Yes
Rear Display Size (inches): 2.5 3.0
Rear Display Resolution: 232,000 dots 460,800 dots (153,600 px)
Touchscreen: No No
Articulating Screen: No No
Tilt Swivel Screen: No No
Selfie Screen: No No
Max Playback Zoom: 8.0x  
Top Deck Display: No
Exposure
Maximum ISO (native):   12800
Minimum ISO (native):   200
ISO Settings: Auto, 50, 100, 200, 400, 800, 1600, 3200 (auto up to 3200 in Digital SR mode) Auto ISO, 200 - 12800
Auto ISO Mode: Yes Yes
White Balance Settings: Auto, Daylight, Shade, Tungsten, Fluorescent, Manual Auto, Incandescent, Fluorescent, Direct Sunlight, Flash, Cloudy, Shade, Preset Manual, Underwater; All except preset manual with fine tuning
Shutter Speed Range: 1/2000 - 4 sec 1/16000 - 30 sec
Bulb Mode: No Yes
Exposure Compensation: +/- 2.0EV in 0.3EV steps +/- 3.0EV in 0.3EV steps
Metering Modes: TTL metering: Multi-segment, Center-weighted, Spot Matrix, Center-weighted (4.5mm), Spot (2mm)
Program Auto Exposure: Yes Yes
Aperture Priority: No Yes
Shutter Priority: Yes Yes
Full Manual Exposure: Yes Yes
Creative Exposure Modes: Natural Skin Tone, Half-length Portrait (3MP), Night Scene, Landscape, Flower, Portrait, Kids, Digital SR (5MP), Surf & Snow, Sport, Pet, Text, Food, Frame Composite (3MP), Dynamic Range Adjustment Scene modes: Portrait, Night Landscape, Landscape, Night Portrait, Close-up; Creative: Creative modes: Pallet, HDR, Easy Panorama, Soft, Miniature Effect, Selective Color, Cross Process, and Toy Camera Effect; Motion Snapshot; Best Moment Capture mode
Self Timer: 2 or 10 seconds 2, 5, 10 seconds
Time Lapse (intervalometer):    
High Resolution Composite: No No
Flash
Built-in Flash: Yes Yes
Flash Modes: On, Off, Auto, Redeye, Soft Flash Fill flash, slow sync, red-eye reduction, slow sync with red-eye reduction, rear-curtain sync, rear curtain with slow sync
Flash Guide Number (ISO 100): n/a 5.0 m / 16.4 ft.
Flash Range Description: Auto ISO: Wide: 0.20 - 23 ft (0.06 – 7.1 m); Tele: Approx. 1.15 – 11 ft (0.35 – 3.5 m) Lens dependent.
Max Flash Sync:   1/60
Flash Exposure Compensation:   -3 to +1 EV in 0.3EV steps
External Flash Connection: n/a n/a
Built-In Wireless Flash Control:    
Image Storage
Usable Memory Types: SD / SDHC microSD / microSDHC / microSDXC
UHS Support:    
Other Memory:    
Dual Card Slots: No No
RAW Capture Support: No Yes
Uncompressed Format:   12-bit NEF RAW
Movie File Format: AVI (DivX MPEG-4) MOV H.264/MPEG-4 AVC with AAC sound
Included Memory: 21.0 MB  
Included Memory Type: Internal  
Connectivity
Built-In Wi-Fi: No No
NFC: No 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 Yes
DPOF Compliant: Yes Yes
Remote Control: Yes
Remote Control Type: IR, optional  
Connections (extended): DC input HDMI out (Type D, Micro)
Performance Timing
Cycle time for JPEG shooting in single shot mode (seconds per frame, max resolution):    
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):    
Camera penalizes early shutter press?
JPEG shooting speed in burst mode (fps, max resolution):   60.0
Buffer size for JPEG shooting in burst mode (frames, max resolution):    
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):    
Shutter lag (full AF, tele):    
Shutter lag (full AF, live view - DSLR):    
Shutter lag (prefocused, live view - DSLR):    
Shutter Lag (manual focus):    
Shutter lag (full AF, with flash):    
Shutter Lag (prefocused):    
Shutter Lag (notes):    
Startup Time:    
Play -> Record Time:    
Flash cycle time, full power:    
Power
Battery Life, Stills (CIPA Rating Monitor/Live View): 240 shots 270 shots
Battery Life, Still (CIPA Rating OVF/EVF):    
Battery Life, Video:    
Battery Form Factor: Proprietary D-LI68 Proprietary EN-EL22
Usable Battery Types: Lithium Ion rechargeable Lithium-ion rechargeable
Batteries Included: 1 x Proprietary D-LI68 Lithium Ion rechargeable 1 x Proprietary EN-EL22a Lithium-ion rechargeabe
Battery Charger Included (dedicated charger or AC/USB adapter): Yes Yes
Dedicated Battery Charger Included:
Internal Charging Supported:
Software
Included Software: Software (S-SW69) CD-ROM ViewNX 2 / Short Movie Creator CD-ROM
OS Compatibility: Windows, Mac OS  
Miscellaneous
Notes & Features: Available in Black, White, Red and Yellow.