Samsung GX-20 Review

Review Date: July 24th 2008
Author: Mark Goldstein

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Page 1
Introduction / Ease of Use
Page 2
Image Quality
Page 3
Sample Images
Page 4
Page 5
Page 6


Image Sensor Type 23.4×15.5mm, CMOS
Effective Pixels Approx. 14.6 Mega-pixel
Total Pixels Approx. 15.1 Mega-pixel
Lens Mount PENTAX KAF2 bayonet mount
Usable Lens Schneider D-XENON, D-XENOGON, SAMSUNG lens
* PENTAX DSLR lenses are available
* KAF2, KAF, KA mount lenses
Viewfinder Type Pentaprism, Natural-Bright-Matte II Focusing Screen
Field of View 95%
Magnification Approx. 0.95X (50mm F1.4 lens•?)
Diopter Adjustment -2.5 ~ + 1.5m-1
LCD Monitor Low-temperature polysilicon TFT color LCD Monitor, 2.7"
(Approx. 230K pixels), Brightness & Color control, Wide angle view
Preview Type Live View, Optical Preview, Digital Preview
Focusing Type TTL phase-matching 11-point AF 
Modes AF Single, Continuous AF, Manual focus
Shutter Type Electronically controlled vertical-run focal plane shutter
Speed Auto?1/4000sec. ~ 30sec. (No step)
Manual?1/4000sec. ~ 30sec. (1/3EV or 1/2EV step)
Metering System TTL open-aperture 16-segment
Metering : Multi, Center-weighted, Spot
Metering range : EV0 ~ 21 (ISO100·50mm F1.4)
Modes Auto, Program, Shutter Priority AE, Aperture Priority AE, Sensitivity Priority AE, Shutter & Aperture Priority, Manual, Bulb, Flash X-sync, Wireless Mode
Compensation ±3 EV (1/2EV step) , ±2EV (1/3EV step)
ISO Auto, 100, 200, 400, 800, 1600, 3200 (1/3EV or 1/2EV step)
6400 (Expanded)
Bulb : Max. 1600
Flash Type Built-in retractable P-TTL pop-up flash
Modes Auto, Fill-in, Auto & Red eye, Fill-in & Red eye, Front curtain synchro, Front curtain synchro & Red eye, Rear curtain synchro
Guide Number 13 (at ISO 100)
Angle of View Coverage 28mm wide-angle (Equivalent to 35mm)
Sync. Speed 1/180sec., Red-eye reduction (Control Range : -2 ~ +1 EV)
Recharging Time Approx. 3.6 sec.
External Flash SEF-36PZF, SEF-54PZF (optional)
Synchro Hot Shoe, X Synchro socket (Sync. Speed : 1/180sec.)
High Speed Synchro, Wireless Synchro (External Flash)
White Balance Modes Auto, Daylight, Shade, Cloudy, Tungsten, Fluorescent (W, D, N), Flash, Manual, Color Temperature (1, 2, 3)
Shooting Modes Auto, Program, Sensitivity Priority, Shutter Priority, Aperture Priority,
Shutter & Aperture Priority, Manual, Bulb, Flash X-sync., User mode
Live View Field of View : Approx. 97%
Magnification(4X, 8X), Grid display, AF Frame
Drive Modes Single, Continuous (Hi, Standard), Self-timer (12sec., 2sec.), Remote Control
Auto Bracket, Expand Bracket, Multi Exposure
Picture Wizard Standard, Vivid, Portrait, Landscape, Custom 1, Custom 2
* Parameter : ±4 (9-step)
Continuous JPEG : 3fps (Hi Continuous : up to 38 shots)
            2.3fps (Standard Continuous : depends on memory capacity)
RAW?3fps (Hi Continuous : up to 16 shots)
             2.3fps (Standard Continuous : up to 16 shots)
Shake Reduction Type Image Sensor Shift
Effective Range Max. 4EV (depends on lens and shooting conditions)
Dust Reduction Yes
Self-timer 2sec., 12sec., Remote control, Remote control 3sec. Remote control Continuous (Compatible with Pentax Remote Control, Optional)
Storage Media SD (up to 4GB guaranteed), MMC (up to 2GB guaranteed),
SDHC (up to 8GB guaranteed)
File Format RAW (DNG), JPEG (DCF), EXIF 2.21, DPOF 1.1, PictBridge 1.0
Image Size 14.6M (4672×3104), 10M : 3872×2592, 6M : 3008×2000, 2M : 1824×1216 (JPEG)
14.6M : 4672×3104 (RAW)
Capacity (512MB)

14.6M : RAW 21
14.6M : Super Fine (1)35, Super Fine(2)61, Fine 109, Normal 213
10M : Super Fine (1)52, Super Fine (2)87, Fine 153, Normal 319
6M  : Super Fine (1)91, Super Fine (2)147, Fine 254, Normal 474
2M  : Super Fine (1)239, Super Fine (2)381, Fine 639, Normal 1060
? These figures are measured under Samsung's standard conditions and may vary depending on shooting conditions and camera settings

Image Play Type Single image, Thumbnail, Rotate, Slide Show (4-type Transition Effect), Histogram, Magnification (up to 32X)
Editing Rotate, Digital Filter, Picture Wizard
Digital Filter B&W (4 types), Sepia (3 types), Color Selection (18 types), Color (6 types), Soft (3 steps), Illustration, HDR (3 steps), Slim (±8 steps), Brightness (±8 steps)
Interface Digital Output : USB 2.0 (HI-SPEED)
Video Output : NTSC, PAL (user selectable)
DC Power Input Connector : DC 8.3V, 2A (100 ~ 240V)
External Release Socket
X Synchro Socket for External Flash
Power Source Dedicated battery Lithium ion battery : SLB-1674, Charger : SBC-L6
Battery life Approx. 500 min./1,000 shots (without flash on), Approx. 430 min./860 shots (with flash 50% on), Approx. 400 min./800shots (with flash 100% on)
Dimensions (WxHxD) 142mm×101mm×71.5mm (excluding the projecting parts of the camera)
Weight 727g (Body only) , 806g (Memory card & Battery included)
Operating Temperature 0 ~ 40 °C
Operating Humidity 5 ~ 85%
Software Camera Driver Storage Driver (Windows 2000/ME/XP/VISTA, Mac OS 10.2 or later)
Application Samsung Master, Samsung RAW Converter 2.0, Adobe Reader
For Windows PC with processor better than Pentium III 450MHz
(Pentium 800MHz recommended)
Windows 2000/ME/XP/Vista
Minimum 256MB RAM (512MB recommended)
250MB of available hard disk space (1GB recommended)
USB port
CD-ROM drive
1024x768 pixels, 16-bit color display compatible monitor
(24-bit color display recommended)

* Samsung Raw Converter 2.0
Pentium 4 or later is recommended
Windows XP service pack 2/Vista 32bit (64-bit OS is unsupported)
Minimum 1GB RAM
1024x768 pixels, 24-bit color display compatible monitor
For Machintosh Power Mac G4 or later
Mac OS 10.2 or later 
Minimum 256MB RAM
250MB of available hard-disk space
USB port
CD-ROM drive
Page 1
Introduction / Ease of Use
Page 2
Image Quality
Page 3
Sample Images
Page 4
Page 5
Page 6

DIWAPhotographyBLOG is a member of the DIWA organisation. Our test results for the Samsung GX-20 have been submitted to DIWA for comparison with test results for different samples of the same camera model supplied by other DIWA member sites.