• 1/2.5 inch 24.7mm2
  • 8.1 megapixels
  • 37.00mm - 112.00mm (35mm eq.)
  • 4/3 224.9mm2
  • 20.2 megapixels
  • ISO 100 - 25,600
  • Detailed specifications
  • Pentax Optio E50
  • YI M1
Links
Prices:    
Manufacturer URL: Manufacturer website Manufacturer website
Predecessor:    
Successor:    
General
Model Number: E50 M1
Alternate Model Number(s):    
Camera Format: Ultra Compact Compact System Camera
Currently Manufactured: No Yes
Retail Price: $149.95 $349.99
Street Price:   $199.00
Date Available: 2008-03-30 2016-12-31
Tripod Mount: Yes Yes
Weight: 4.2 oz (119 g)
includes batteries
9.9 oz (280 g)
includes batteries
Size: 3.8 x 2.4 x 0.9 in.
(97 x 61 x 23 mm)
4.5 x 2.5 x 1.3 in.
(114 x 64 x 34 mm)
Waterproof: No No
Waterproof Depth: n/a n/a
Image Sensor
Sensor Type: CCD CMOS
Sensor Manufacturer:   Sony
Effective Megapixels: 8.1 20.2
Sensor Format: 1/2.5 inch 4/3
Sensor size: 24.7104mm2 (5.76mm x 4.29mm) 224.9mm2 (17.30mm x 13.00mm)
Approximate Pixel Pitch: 1.76 microns 3.34 microns
Focal Length Multiplier: n/a 2.0x
Aspect Ratio: 4:3 4:3
Color Filter Type: RGBG RGBG
Anti Aliasing Filter:    
Self-Cleaning: No No
Sensor shift image stabilization: No No
On-Sensor Phase Detect: No No
DxO Sensor Score:    
DxO Color Depth Score (bits):    
DxO Dynamic Range Score (evs):    
DxO Maximum Effective ISO Score (iso):    
Image Capture
Image Resolution: 3264 x 2448 (8.0 MP, 4:3),
2592 x 1944 (5.0 MP, 4:3),
2304 x 1728 (4.0 MP, 4:3),
2048 x 1536 (3.1 MP, 4:3),
1600 x 1200 (1.9 MP, 4:3),
1024 x 768 (0.8 MP, 4:3),
640 x 480 (0.3 MP, 4:3)
5184 x 3888 (20.2 MP, 4:3)
Image File Format: JPEG (EXIF 2.2) JPEG (EXIF 2.3), RAW (DNG)
Continuous-mode frames/second: n/a 5.0
Video Capture
Can take movies: Yes Yes
Movie Resolution: 640x480 (30/​15)
320x240 (30/​15)
3840x2160 (30p)
2048x1536 (30p)
1920x1080 (60p/​30p/​24p)
1280x720 (60p/​30p/​24p)
640x480 (240p)
Movie File Format: TBA Video: MPEG-4/H.264, Audio: AAC
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 Micro Four Thirds
Lens: Pentax zoom lens, 6 elements in 5 groups with 3 aspherical elements XIAOYI 12-40mm F3.5-5.6
Focal Length (35mm equivalent): 37 - 112mm 24 - 80mm
Focal Length (actual): 6.2 - 18.6mm 12 - 40mm
Zoom Ratio: 3.00x 3.33x
Aperture Range: f/2.8 (wide) / f/5.2 (tele) - ??? f/3.5 (wide) / f/5.6 (tele) - f/22
Integrated ND Filter: No No
Normal Focus Range: 40 cm to Infinity
15.7 in to Infinity
35 cm to Infinity
13.8 in to Infinity
Macro Focus Range: 15 cm to Infinity
5.9 in to Infinity
 
Filter Thread: n/a 49.0mm
Thread Type: n/a n/a
Optical Image Stabilization: No No
Digital Zoom: Yes
Digital Zoom Values: 4x  
Auto Focus
Auto Focus: Yes Yes
Auto Focus Type: 3-point TTL contrast detection Contrast Detection: 81 points; AF: Single AF (S-AF), Continuous AF (C-AF), Touch Screen Focus & Shoot
Auto Focus Assist Light? Yes Yes
Manual Focus: Yes Yes
Viewfinder
Viewfinder: LCD No / LCD
Viewfinder Type:    
Focus Peaking: No Yes
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): 2.4 3.0
Rear Display Resolution: 110,000 dots 1,036,800 dots (345,600 px)
Touchscreen: No Yes
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):   25600
Minimum ISO (native):   100
ISO Settings: Auto (100 - 800), 1600 in Digital SR mode Auto, 100 - 25600
Auto ISO Mode: Yes Yes
White Balance Settings: Auto Auto, Cloudy, Custom, Incandescent, Shade, Sunlight
Shutter Speed Range: 1/2000 - 4 sec 1/4000 - 60 sec
Bulb Mode: No Yes
Exposure Compensation: +/- 2.0EV in 0.3EV steps +/- 5.0EV in 0.3EV steps
Metering Modes: TTL multi-segment Evaluative, Center-weighted, Spot
Program Auto Exposure: Yes Yes
Aperture Priority: No Yes
Shutter Priority: No Yes
Full Manual Exposure: No Yes
Creative Exposure Modes: Night Scene, Landscape, Flower, Portrait, Surf & Snow, Sport, Digital SR, Kids, Pet, Panorama, Frame Composite Panorama, Scene (Portrait, Landscape, Sport, Night Scene Portrait, Candle,Sunset, Fireworks, Beach & Snow), Super Professional guide, HDR
Self Timer: 2 or 10 seconds 2, 10 seconds
Time Lapse (intervalometer):   Yes
High Resolution Composite: No No
Flash
Built-in Flash: Yes No
Flash Modes: Auto, Flash On, Flash Off, Red-eye Reduction Auto, On, Off
Flash Guide Number (ISO 100): n/a n/a
Flash Range Description: Auto ISO: approx 20 ft (wide), 10 ft (tele) n/a
Max Flash Sync:   1/125
Flash Exposure Compensation:    
External Flash Connection: n/a Hot Shoe
Built-In Wireless Flash Control:    
Image Storage
Usable Memory Types: SD / SDHC SD / SDHC / SDXC
UHS Support:    
Other Memory:    
Dual Card Slots: No No
RAW Capture Support: No Yes
Uncompressed Format:   RAW (DNG)
Movie File Format: TBA Video: MPEG-4/H.264, Audio: AAC
Included Memory: 9.5 MB No memory included
Included Memory Type: Internal  
Connectivity
Built-In Wi-Fi: No Yes
NFC: No No
Bluetooth: No Yes
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,Bluetooth,WiFi
PictBridge Compliant: Yes No
DPOF Compliant: Yes Yes
Remote Control: No Yes
Remote Control Type:   Via Wi-Fi
Connections (extended): Dock terminal connection (Kodak ImageLink) Micro HDMI (Type-D), USB 2.0
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):   5.0
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): 250 shots (Alkaline AA) 380 shots
Battery Life, Still (CIPA Rating OVF/EVF):    
Battery Life, Video:    
Battery Form Factor: 2 x AA Proprietary
Usable Battery Types: Alkaline or Lithium disposable, NiMH rechargeable Lithium-ion rechargeable
Batteries Included: TBA 1 x Proprietary Lithium-ion rechargeable
Battery Charger Included (dedicated charger or AC/USB adapter): No Yes
Dedicated Battery Charger Included: No
Internal Charging Supported: Yes
Software
Included Software: TBA  
OS Compatibility: TBA  
Miscellaneous
Notes & Features: Available in Ice Silver and Storm Black.