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دوربين عكاسی ديجيتال - Samsung / سامسونگ GX-20

Samsung SLR evolves with the launch of the GX-20

24 January 2008 – Samsung, leaders in digital imaging, today announces the launch of the 14.6 mega-pixel GX-20 digital SLR. The Samsung GX-20 is aimed firmly at the discerning enthusiast photographer who wants comprehensive functions, stunning design, ease of use and real value for money - all in one camera. Samsung also announces the launch of two new lenses, giving both GX-20 and GX-10 series users even more freedom to express their creativity.

Robert King, Commercial Director of Samsung Cameras says, “With the launch of the GX-20 digital SLR, Samsung has a full digital camera line-up ranging from convergent compact digital cameras through to high-end fully-featured digital SLRs. This product is the start of an exciting DSLR range for Samsung as it is our first DSLR with our own manufactured CMOS sensor. This is a very important step for Samsung which is set to support our expansion in this competitive product sector.

“The GX-10 is the next step in Samsung's continued growth in the SLR market – the new GX-20 offers cutting-edge functions as well as outstanding picture quality to satisfy users of all abilities.”

GX-20 - Intelligent design

The GX20 boasts a 14.6 mega-pixel image sensor, which offers the photographer a sharper image with richer colours for a truly compelling composition. Taking photos is made easier with the Enhanced Digital Filter which allows a greater dynamic range of exposures and can also be used to add various effects or compensate for missing pixels after taking a picture. For unrivalled photo viewing, the GX-20 also comes complete with a wide view 2.7” TFT LCD (230k pixels) and live view through the optical viewfinder or LCD display.

With its powerful built-in Optical Picture Stabilisation (OPS) technology, the GX-20 prevents blurred pictures by shifting the CCD to counter any movement of the camera’s body. This function is designed to minimize shake by oscillating the image sensor vertically and horizontally – eliminating the need for additional anti-shake lenses.

The GX-20 is robust enough for taking quality pictures in wet, sandy or dusty conditions. The special water-resistant and anti-dusting body sealing protects 72 different parts and the advanced Dual Dust Removal System included in the GX-20 also removes problematic particles from the sensor, resulting in perfect, blemish-free pictures with minimum effort on the part of the photographer.

With the one-touch RAW button, built into the GX-20, RAW file shooting is made simple and instantly available to users even during general JPEG shooting. The RAW files can be checked on the LCD and then be directly converted to JPEG format via the built-in converter.

With the GX-20, continuous shooting at 3 fps (frames per second) is possible; up to 9 fps; giving the user the best chance to get a great picture.

A comprehensive lens offering

Samsung also announces the launch of two new lenses. These lenses have been designed to enable real freedom in the creative process and include: 18-55mm II F3.5~F5.6 and 18-250mm F3.5~F6.3. The lenses are also compatible with Samsung’s popular GX-10 DSLR.

The award winning i range and NV series (including EISA and TIPA awards) launched in 2007, have enabled Samsung to grow consistently and take market share in the compact camera space. The launch of the GX-20 will see Samsung building on the success of the GX-10 and increase its presence in the digital SLR market.

Pricing and availability

The GX-20 and lenses are expected to be available from March 2008, price for the GX-20 with 18-55mm lens - £699 RRP.

Key features:

14.6M, APS-C size Samsung CMOS Sensor
Optical Image Stabilization (OIS)
Dual Dust Reduction System (Dust reduction by shake & Special coating)
Sealed build with 72 different points (Semi water & dust proof)
Live view (Digital Preview)
2.7” Large wide Color TFT LCD (230,000 pixels)
X sync. terminal for external Flash
Enhanced Digital filter (HDR - High Dynamic Range & Pixel Mapping)
Professional RAW Converting S/W
Lens and Accessories

Samsung GX-20 specifications


Body material	• High-impact plastic with metal sub-structure • Dust and weather resistant seals throughout
Sensor	• 14.6 million effective pixels • 3:2 aspect ratio • 23.4 x 15.6 mm CMOS sensor • RGB Color Filter Array • Built-in fixed low-pass filter • 15.1 million total pixels
Image processor	• PRIME • 22-bit ADC
Stabilization	Sensor shift
Image sizes	• 4688 x 3120 [14.6 MP] (RAW/DNG) • 4672 x 3120 [14.6 MP] • 3872 x 2592 [10 MP] • 3008 x 2000 [6 MP] • 1824 x 1216 [2 MP]
File formats	• RAW (DNG) • RAW + JPEG • JPEG (EXIF 2.21)
RAW compression	n/a
Lens mount	• PENTAX bayonet KAF2 mount • KAF2, KAF, KA mount lenses
Usable lenses	• Schneider D-XENON, D-XENOGON, SAMSUNG lens • PENTAX DSLR lenses are available • KAF2, KAF, KA mount lenses
Auto Focus	• TTL phase-matching 11-point AF • SAFVOX VIII • AF operational brightness range: EV –1 to 18 (at ISO 100 with f/1.4 lens) • Focus lock
Lens Servo	• Single Servo AF • Continuous Servo AF • Manual focus
Focus Point	11 focus points
AF Area Mode	• Single point AF • Center AF • Automatic-area AF
Focus Lock	Half-press shutter
AF assist	External Speedlite only
Exposure modes	• Auto • Program • Shutter Priority AE • Aperture Priority AE • Sensitivity Priority AE • Shutter & Aperture Priority • Manual • Bulb • Flash X-sync • User Mode
Metering	• TTL open-aperture 16-segment • Metering : Multi, Center-weighted, Spot
Metering range	• EV0 ~ 18 (ISO 100, 50mm F1.4)
Exposure lock	Yes
Exposure bracketing	• 2 to 9 frames • 1/3, 1/2, 2/3 or 1 EV steps
Exposure compen.	• +/-3 EV (1/2EV step) , +/-2EV (1/3EV step)
Sensitivity	Auto, 100, 200, 400, 800, 1600, 3200 (1/3EV or 1/2EV step) 6400 (User setting)
Shutter	Electronically controlled vertical-run focal plane shutter
DOF Preview	Yes
White balance	Auto, Daylight, Shade, Cloudy, Tungsten, Fluorescent (W, D, N), Flash, Manual, Color Temperature (1, 2, 3), One Touch WB
Image parameters / Presets	• B&W(4 type) • Sepia(3 type) • Color (18 type) • Color extract (6 type) • Soft (three-level amount adjustable) • Illustration • HDR (3 type) • Slim (+/- 8 level amount adjustable) • Brightness (+/- 8 level amount adjustable)
Color space	• sRGB • Adobe RGB
Viewfinder	• Pentaprism • 95% Field of View • Diopter Adjustment -2.5 ~ +1.5m-1
Focusing screen	Natural-Bright-Matte II Focusing Screen
LCD monitor	Low-temperature polysilicon TFT color LCD Monitor, 2.7" (approximately 230K pixels), Brightness control, Wide angle view
LCD Liveview	• Live View(up to 3min.), Digital Preview • Field of view 100%, Magnification, Grid display
Self-timer	• 2sec., 12sec. • Remote control, Remote control 3sec. (Compatible with Pentax Remote Control, Optional)
Shooting modes	• Single • Continuous (Hi, Low) • High-speed Continuous • Self-timer (12sec., 2sec.) • Remote Control (3sec.) • Remote Control Continuous • Auto Bracket • Expand Bracket • Multi Exposure
Continuous	• JPEG : 3fps (depends on memory capacity) • RAW?3fps (up to 9 frames)
Flash	• Type Built-in retractable P-TTL auto 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 28 mm wide-angle (Equivalent to 35mm) • Sync. Speed 1/180sec., Red-eye reduction (Control Range : -2 ~ +1 EV)
External flash	• Hot Shoe • X Synchro socket (Sync. Speed : 1/180sec.) • High Speed Synchro, Wireless Synchro (External Flash)
Playback options	• Single image, Thumbnail, Rotate, Slide Show (Transition Effect), Histogram • Edit: Rotate, Digital Filter, Picture Wizard * Picture Wizard : Normal, Vivid, Soft, Portrait, Landscape * Picture Wizard Parameter Range : ± 4 (9 steps) • 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) • Pixel Mapping
Connectivity	• 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
Storage	• SD/MMC • SDHC
Power	Lithium ion battery : SLB-1674, Charger : SBC-L6,
Dimensions	142mm × 101mm × 71.5mm (excluding the projecting parts of the camera)
Weight (no batt)	n/a

Samsung GX-20 brief 'hands on'

The GX-20 is Samsung's fourth digital SLR produced in association with Pentax, and - slight styling and menu differences aside - is essentially the same camera as the Pentax K20D launched last night. Although pricing is obviously fairly fluid in this market the GX-20 is expected to sell for slightly less than the K20D. There's not a huge amount to say about the GX-20 that doesn't apply to the K20D, so we'll mainly stick to looking at the differences on this page.

As with the K20D this is a case of 'evolution' rather than 'revolution' compared to the GX-10 (which was a Pentax K10D doppleganger). The key changes are the new higher resolution sensor and, this being 2008, Live Preview.

Key features

14.6M, APS-C size Samsung CMOS Sensor
Optical Image Stabilization (OIS)
Dual Dust Reduction System (Dust reduction by shake & Special coating)
Sealed build with 72 different points (Semi water & dust proof)
Live view (Digital Preview)
2.7” Large wide Color TFT LCD (230,000 pixels)
X sync. terminal for external Flash
Enhanced Digital filter (HDR - High Dynamic Range & Pixel Mapping)
Professional RAW Converting S/W

Side by Side: Pentax K20D

There are small exteral differences between the GX-20 and the K20D, but it's obvious that the cameras share the same DNA.

In fact the only differences between the K20D and the GX-20 are the menu layout and user-interface (where, on first impressions at least, Samsung actually appears to be the better of the two), the supplied RAW converter and the design of the buttons and body shape (the buttons are all in the same place and have the same functions). There may well be minor feature differences (Samsung's spec and press release are rather thin on detail) that we missed in the few hours we spent with the GX-20; we'll document these in depth when we get to the reviewing stage.

The new CMOS sensor (15.1 MP, 14.6 million effective pixels) is manufactured by Samsung but co-developed with Pentax and gives sensitivity settings of ISO 100-3200 (ISO 6400 is also available as a custom function). We're told that the internal (JPEG) processing is different on the two cameras, though how this will affect the end result will have to wait until we've had chance to test the cameras side-by-side.

In your hand

Like the K20D (and the K10D / GX-10) the GX-20 feels solidly built and fits the hand very comfortably with all the important controls in the right place and a large grip. The grip is actually slightly different on the GX-20 and the K20D, and which you prefer will be a matter of taste (and possibly the size of your hands).