• APS-C 369.7mm2
  • 14.6 megapixels
  • ISO 100 - 3200
  • APS-C 369.0mm2
  • 14.8 megapixels
  • ISO 100 - 6400
  • Detailed specifications
  • Samsung GX-20
  • Sigma SD1 Merrill
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Manufacturer URL: Manufacturer website Manufacturer website
Predecessor:    
Successor:    
General
Model Number: GX-20 SD1 Merrill
Alternate Model Number(s):   SD1
Camera Format: Pro SLR Pro SLR
Currently Manufactured: No Yes
Retail Price: $1399.95 $2299.00
Street Price:   $1,799.00
Date Available: 2008-03-30 2011-06-01
Tripod Mount: Yes Yes
Weight: 25.2 oz (714 g) 28.1 oz (796 g)
includes batteries
Size: 5.6 x 4.0 x 2.8 in.
(142 x 102 x 70 mm)
5.7 x 4.5 x 3.1 in.
(146 x 114 x 80 mm)
Waterproof: No No
Waterproof Depth: n/a n/a
Image Sensor
Sensor Type: CMOS CMOS
Sensor Manufacturer:   Foveon X3
Effective Megapixels: 14.6 14.8
Sensor Format: APS-C APS-C
Sensor size: 369.72mm2 (23.7mm x 15.6mm) 368.95mm2 (23.50mm x 15.70mm)
Approximate Pixel Pitch: 5.07 microns 5.00 microns
Focal Length Multiplier: 1.5x 1.5x
Aspect Ratio: 3:2 3:2
Color Filter Type: RGBG Full Color
Anti Aliasing Filter: Fixed Not needed
Self-Cleaning: Yes No
Sensor shift image stabilization: Yes No
On-Sensor Phase Detect: No No
DxO Sensor Score: 68  
DxO Color Depth Score (bits): 23.1  
DxO Dynamic Range Score (evs): 11.2  
DxO Maximum Effective ISO Score (iso): 714  
Image Capture
Image Resolution: 4672 x 3104 (14.5 MP, Other),
3872 x 2592 (10.0 MP, Other),
3008 x 2000 (6.0 MP, 3:2),
1824 x 1216 (2.2 MP, 3:2)
4704 x 3136 (14.8 MP, 3:2),
3264 x 2176 (7.1 MP, 3:2),
2336 x 1568 (3.7 MP, Other)
Image File Format: JPEG (EXIF 2.21), RAW (.PEF, .DNG), 14-bit JPEG, RAW (.X3F), RAW + JPEG
Continuous-mode frames/second: n/a 4.1
Video Capture
Can take movies: No No
Movie Resolution:
Movie File Format:    
Composite Video Out: Yes Yes
NTSC/PAL Switchable Video: Yes Yes
Video Usable as Viewfinder: No No
HD Video Out: No No
HD Video Connection:
Lens & Optics
Lens Mount: Pentax K (KA/KAF/KAF2) Sigma SA bayonet
Lens: n/a Sigma 17-50mm f/2.8 EX DC OS HSM
Focal Length (35mm equivalent):   26 - 75mm
Focal Length (actual):   17 - 50mm
Zoom Ratio:   2.90x
Aperture Range:   f/2.8 - f/22 (W/T)
Integrated ND Filter: No No
Normal Focus Range:   28 cm to Infinity
11.0 in to Infinity
Macro Focus Range:    
Filter Thread: n/a 77.0mm
Thread Type: n/a n/a
Optical Image Stabilization: No Yes
Digital Zoom: No No
Digital Zoom Values: n/a n/a
Auto Focus
Auto Focus: Yes Yes
Auto Focus Type: 11-point TTL phase-matching (SAFOX VIII) Phase-detection with 11-point Twin Cross AF Sensor; Single AF, Continuous AF (with AF motion prediction function), Manual
Auto Focus Assist Light? Yes Yes
Manual Focus: Yes Yes
Viewfinder
Viewfinder: Optical / LCD Optical / LCD (playback only)
Viewfinder Type: SLR type; eye-level pentaprism SLR type; Pentaprism, 98% coverage, 0.95x magnification, 18mm eyepoint, -3 to +1.5 diopter
Focus Peaking: No No
EVF Resolution: n/a n/a
Viewfinder Magnification (35mm equivalent):   0.63x
Viewfinder Magnification (nominal/claimed):   0.95x
Display
Eye-level Viewfinder: Yes Yes
Rear Display: Yes Yes
Rear Display Size (inches): 2.7 3.0
Rear Display Resolution: 230,000 dots 460,000 dots
Touchscreen: No No
Articulating Screen: No No
Tilt Swivel Screen: No No
Selfie Screen: No No
Max Playback Zoom: 32.0x  
Top Deck Display: Yes No
Exposure
Maximum ISO (native): 3200 6400
Minimum ISO (native): 100 100
ISO Settings: Auto, 100, 200, 400, 800, 1600, 3200, 6400 (expanded) 100, 200, 400, 800, 1600, 3200, 6400
Auto ISO Mode: Yes Yes
White Balance Settings: Auto, Daylight, Shade, Cloudy, Tungsten, Fluorescent (W, D, N), Flash, Color Temperature Auto, Daylight, Shade, Overcast, Incandescent, Fluorescent, Flash and Custom
Shutter Speed Range: 1/4000 - 30 sec 1/8000 - 30 sec
Bulb Mode: Yes Yes
Exposure Compensation: +/- 3.0EV in 0.3EV steps +/- 3.0EV in 0.3EV steps
Metering Modes: TTL open-aperture: 16-segment, Center-weighted, Spot 77-segment Evaluative, Center-Weighted Average, Center Area, Spot Metering; EV 1 to 20 (50mm F1.4 : ISO100)
Program Auto Exposure: Yes Yes
Aperture Priority: Yes Yes
Shutter Priority: Yes Yes
Full Manual Exposure: Yes Yes
Creative Exposure Modes: Sensitivity Priority, Shutter and Aperture Priority  
Self Timer: 2 or 12 seconds 2 or 10 seconds
Time Lapse (intervalometer):    
High Resolution Composite: No No
Flash
Built-in Flash: Yes Yes
Flash Modes: On, Redeye, Slow Sync, Slow Sync + Redeye, Trailing Curtain Sync, Wireless S-TTL (17mm lens angle covered)
Flash Guide Number (ISO 100): n/a 11.0 m / 36.1 ft.
Flash Range Description: Depends on lens Lens aperture dependent.
Max Flash Sync: 1/180 1/180
Flash Exposure Compensation:   +/- 3.0 EV in 0.3EV steps
External Flash Connection: Hot Shoe, X-Sync Socket Hot Shoe, PC Sync socket
Built-In Wireless Flash Control:    
Image Storage
Usable Memory Types: SD / SDHC CF1
UHS Support:    
Other Memory:    
Dual Card Slots: No No
RAW Capture Support: Yes Yes
Uncompressed Format: RAW (.PEF, .DNG), 14-bit RAW (.X3F), RAW + JPEG
Movie File Format:    
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: 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 No
Remote Control: Yes Yes
Remote Control Type: Wired or IR Optional RS-31 IR Wireless, CR-21 Wired
Connections (extended): DC input, wired remote Wired Remote, DC Input jacks
Performance Timing
Cycle time for JPEG shooting in single shot mode (seconds per frame, max resolution):   0.78
Cycle time for RAW shooting in single shot mode (seconds per frame):   0.78
Buffer size for RAW shooting in single shot mode (frames):   7
Cycle time for RAW+JPEG shooting in single shot mode (seconds per shot):    
Camera penalizes early shutter press? Yes
JPEG shooting speed in burst mode (fps, max resolution):   4.1
Buffer size for JPEG shooting in burst mode (frames, max resolution):   7
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):   0.38 seconds
Shutter lag (full AF, tele):    
Shutter lag (full AF, live view - DSLR):    
Shutter lag (prefocused, live view - DSLR):    
Shutter Lag (manual focus):   0.244 seconds
Shutter lag (full AF, with flash):   0.52 seconds
Shutter Lag (prefocused):   0.088 seconds
Shutter Lag (notes):   Full Autofocus Lag: Auto Area AF = 0.466s
Startup Time:   4.5 seconds
Play -> Record Time:   0.5 seconds
Flash cycle time, full power:    
Power
Battery Life, Stills (CIPA Rating Monitor/Live View):    
Battery Life, Still (CIPA Rating OVF/EVF):    
Battery Life, Video:    
Battery Form Factor: Proprietary Proprietary BP-21
Usable Battery Types: Lithium-ion rechargeable Lithium-ion rechargeable
Batteries Included: 1 x Proprietary Lithium-ion rechargeable 1 x Proprietary BP-21 Lithium-ion rechargeable
Battery Charger Included (dedicated charger or AC/USB adapter): Yes Yes
Dedicated Battery Charger Included:
Internal Charging Supported:
Software
Included Software:   Sigma Photo Pro 5.0
OS Compatibility:    
Miscellaneous
Notes & Features: 46-megapixel 23.5 x 15.7mm APS-C full-color sensor, weather-resistant magnesium alloy body, dual "TRUE II" image processing engines, 11-point Twin Cross AF sensor, CompactFlash Type 1 with UDMA support.