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2011年7月23日星期六

50 mm Sigma lens

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Dennis HissinkTuesday, September 23, 2008
Posted by: Dennis Hissink

Tits goal of large aperture medium telephoto lens is offering the equivalent of 100 mm angle of view on four thirds cameras. The optimum optical design and molded glass elements provide excellent aspherical lens aberration correction a coma. Ensures superior peripheral brightness and provides sharp, high contrast even at maximum aperture. The Super Multi layer coating reduces flare and ghosting. Superior optical performance are ensured throughout the range of focus. Rounded Diaphragm Blades 9 creates a blur. This lens incorporates HSM (hyper Sonic Motor) ensures a quiet and high-speed AF as well as the focus of full-time manual ability.

Sigma 50mm lens

Sigma 50 mm lens specifications
Lens construction: 8 groups, 6 elements
Viewing angle: 24.4 degrees
Number of blades: 9pcs
Minimum aperture: F16
Minimum focus distance: 45 cm/17.7 in
Maximum magnification: 1: 7.4
Filter size: φ77mm
Lens Hood Petal-type Hood:
Size: 73.7 mm φ 84.5 mm/3.3 x 2.9 in
Weight: 530 g 18.7 oz
Lens Hood LH829-01
Accessories: Sigma DG UV 77 mm
Accessories Sigma DG Wide Circular PL 77 mm


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2011年7月20日星期三

Sigma SD14 digital SLR

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Sony A100 Review
Ilse Jurrien Tuesday 26th, September 2006
Posted by: Ilse Jurrien

The Sigma Corporation is pleased to announce the launch of the new Sigma SD14 Digital SLR camera. The new Sigma SD14, powered by the 14 Megapixels Foveon X3 direct-image-sensor, can reproduce high definition images rich in gradation and impressive three-dimensional detail. The Sigma SD14 Digital SLR camera features four JPEG recording modes, large and bright pentaprism viewfinder with 98% coverage, a built-in flash with a Guide Number of 11, 5-point AF system, a large 2.5-inch 150,000 pixel resolution LCD monitor as well as high resolution and user friendly design. The durable shutter mechanism has over 100,000 cycle life and is ideal for the demands of digital photography.

Sigma SD14

Sigma SD14 SLR - Foveon X3 sensor
Sigma introduced its first digital SLR camera, the SD9, to the market in October 2002, and has established strong support from a wide range of photographers both amateur and professional alike. The second model, the SD10, released on to the market in November 2003 continued to build on the support of loyal photographers. However, demand for JPEG?s greater convenience in image handling has increased and in order to meet this demand the new Sigma SD14, powered by Foveon X3 direct image sensor, now includes JPEG mode with high image quality, high performance and versatility.

Sigma SD14 DSLR - 14 Megapixels
The Foveon X3 direct image sensor featured in the Sigma SD14 digital SLR can capture all primary RGB colors at each and every pixels arranged in three layers, insuring the capture of full and complete color. Using three silicon-embedded layers of pixel sensors, stacked to take advantage of silicon?s ability to absorb red, green, and blue light at different respective depths, it efficiently reproduces color more accurately, and offers sharper resolution, pixel for pixel, than any conventional image sensor. Until now, all other image sensors have featured a just single layer of pixels and each pixel captures only one color of light, which has been filtered through a single color filter. Since mosaic-based conventional image sensors capture only one-third of the color, complicated computation is required to interpolate the color they miss. Interpolation leads to color errors, color artefacts and a loss of image detail. Low pass filters must then be used to reduce color artefacts. The use of low pass filters adversely affects sharpness and resolution of the final image captured.

SD14 Sigma digital SLR - JPEG and RAW format
The Sigma SD14 incorporates both RAW and JPEG image recording formats enabling photographers to capture the highest possible picture definition and small file sizes. JPEG recording, also built in to the Sigma SD14, can be used for the following printing sizes; Super High (14.15 million pixels: 4608?3072 pixels) can be used for A3 (297x420mm/11.6"x16.5") or larger prints. High (4.64 million pixels: 2640?1760 pixels) for A4 size (210x297mm/8.2"x11.6") printing. Medium (2.1 million pixels: 1776?1184 pixels) can be used for regular size printing. Low (1.03 million pixels: 1296?864 pixels) can be used for web-page and e-mail transmission. There is a choice of three JPEG quality settings: Fine, Normal and Basic.

Sigma digital SLR camera - Software
The Sigma SD14 comes complete with Sigma Photo Pro 3.0 software, a RAW image developer that converts all RAW data quickly and easily. Adjustments can be made in three separate modes. The X3F Mode stores the original settings of the image at the point of capture. In the Auto Adjustment Mode, the software analyzes and automatically makes adjustments to the RAW data. The Custom Mode allows the photographer to make individual adjustments (exposure, contrast, shadow, highlight, saturation, sharpness and fill-light for example). Subtle or dramatic changes can be made by the photographer easily and quickly by simply adjusting the slider controls within the software. The X3F Mode stores the original settings of the image at point of capture. Photographers` personal modifications can be saved to the RAW, X3F file for future use. Sigma Photo Pro 3.0 supports 8-bit TIFF, 16-bit TIFF, and JPEG file formats and also outputs images in color space (s.a. sRGB and AppleRGB). The default setting for resolution is the same as the resolution selected when capturing the image on the camera (High, Medium, or Low). It is also possible to half, (for sending via e-mails) or double (for high quality enlargements, max. 18.58 million pixels: 5,280?3,520pixels) the resolution when processing the image.

Sigma SD-14 - Dust protector
Most digital SLR cameras are typically vulnerable to dust entering the body especially when the lens is removed for changing. Dust and dirt entering through the lens mount of a digital camera can be seriously detrimental to image quality. The dust protector of the Sigma SD14 prevents dust from entering and adhering to the image sensor. Even if dust adheres to the dust protector it will not have an adverse influence on image quality as the dust protector is located away from the image sensor and is therefore out of focus.

Sigma SD14 - Viewfinder and Monitor
The Sigma SD14 is equipped with a newly developed pentaprism viewfinder, which has 98% (vertical and horizontal) coverage with 0.9x magnification, an 18mm eye point and ?3 to +1.5 dpt dioptric adjustment. The SD14 camera features a new, large 2.5 inch, 150,000 pixel resolution LCD monitor. The LCD monitor displays 100% of the image, allowing the photographer to easily and accurately confirm the image composition. It features playback options including single frame, thumbnail display (9 images), and three types of magnification (which is achieved by use of the 4-way controller). Shutter speed, aperture and other settings can be seen by pressing the INFO button. The large menu interface makes reviewing images and navigating menu options easy.

Sigma SD14 digital SLR camera - Shutter and Auto focus
The durable focal plane shutter mechanism has life cycle of over 100,000 exposures. The shutter is ideally suited to the requirements of digital cameras. This new shutter dramatically reduces the amount of dust and dirt from the shutter mechanism. The photographer can enjoy taking pictures without worrying about dirt and dust adhering to the image sensor either from inside or outside the camera. The new auto focus sensor features 5 focusing points (center, left, right, up and down) ensuring consistently fast and precise focusing. The AF metering features a cross type sensor in the center of the screen. Selecting the AF point can be done automatically or manually by photographer.

Sigma SD14

Sigma DSLR SD14 - Speed
The Sigma SD14 features a continuous shooting speed of 3 frames per second. Continuous shooting can be accomplished in conjunction with the camera?s predictive auto focus function when photographing fast moving subjects. The camera?s high-speed image processing circuits are capable of handling large data files generated by the high-resolution 14 Megapixels high quality sensor. The number of images that can be captured in continuous shooting mode is dependent upon the resolution setting; High - 6 frames, Medium - 12 frames and Low - 24 frames. These figures apply in either RAW or JPEG mode.

Sigma SD14 camera - Flash and Interface
The Sigma SD14 camera?s built-in flash offers an angle of coverage of 17mm (equivalent to 28mm with 35mm full size) lens with a guide number of 11 (ISO 100). Built-in flash can be synchronized to a shutter speed up to 1/180 sec. This built-in flash enables automatic S-TTL shooting, which allows simple, easy control of advanced photography techniques. The new layout of control buttons insures quick identification of the desired functions and easy use of the multifunction interface in operating camera settings. Clearly marked buttons make it easy for the photographer to display and adjust the most important settings, namely ISO, resolution, JPEG quality and file type, and white balance, on one screen, using one button. The top LCD panel incorporates a backlight, which enables the camera to be easily controlled in low light or dark conditions.

Sigma SLR SD14 - Mirror and Top LCD panel
The mirror lock-up mechanism raises the mirror thus preventing vibration when the shutter is released. This prevents camera shake, and is especially effective for macro photography, using extremely long telephoto lenses or scientific work. Use of a remote controller (sold separately) or cable release (sold separately) also reduces the possibility of camera shake. The top LCD panel allows the photographer to quickly and accurately confirm information such as resolution setting, metering mode, battery status, and the number of images that can be recorded on the CF card. It also incorporates an orange backlight, which enables the camera to be easily controlled in low light or dark conditions.

Sigma D-SLR camera - Metering
The Sigma SD14 is equipped with three types of metering mode: 8-segment Evaluative Metering, Center Area Metering and Center Weighted Average Metering. This enables the photographer to select the metering mode depending on subject and situation. Exposure compensation function allows the photographer to override the exposure value set by the camera?s exposure meter. Auto Bracketing function allows the exposure to be adjusted by 1/3 EV increments up to ?3 EV from the exposure automatically set by the camera. In situations where it is difficult to determine proper exposure, the auto bracketing function allows a sequence of pictures to be taken of the same subject at three different exposure levels; Appropriate Exposure, Under Exposure and Over Exposure.

Sigma SD14 system camera - Power and Accessories
The Lithium-ion Battery BP-21 (included with the camera) can shoot approximately 500 images on one full charge. It takes about 120 minutes to fully charge with Battery Charger BC-21 (also included). The optional power grip PG-21 has a vertical shutter release button and can hold two BP-21 batteries, supplying more than enough power for most shoots. The AC Adapter SAC-21 (sold separately) enables the Sigma SD14 to obtain power from the mains supply. The Sigma SD14 can be used with over 40 Sigma lenses such as ultra-wide, ultra-telephoto, macro, and fisheye. The EF-500 DG SUPER, EF-500 DG ST, and EM-140 DG flashguns offer fully automatic S-TTL flash dedication. Other accessories include the power grip (PG-21), cable release (CR-21), remote controller (RS-31) and the AC adaptor (SAC-21). These accessories ensure that the SD14 system is both user-friendly and versatile.

Sigma EF-500 DG Super flash gun
The high power EF-500 DG Super flash enables S-TTL automatic flash metering. It has a high-speed synchronization function, which can be used at high shutter speeds and wireless flash connectivity. The high-powered auto zoom flash featuring automatic flash metering using S-TTL operation. Allows perfect flash shots effortlessly. This flashgun also includes an automatic zoom function and bounce-head function.

Sigma PG-21 power grip
This specially designed battery pack (PG-21) with vertical grip is dedicated for SD14 use, and can hold two BP-21 batteries. Remote control allows the photographer to take self-portraits or get into group shots. Used in conjunction with the Mirror Lock-Up function, it can reduce the possibility of image-blurring camera shake, making it particularly useful for macro or telephoto shooting.

Sigma RS-31 remote controller
The CR-21 Cable Release is an alternative to the RS-31 Remote Controller offering a wired connection to the camera. This reduces the risk of camera shake, which can result in blurred images. Especially useful when using Mirror up and super-telephoto lenses. This is used to provide a constant electricity supply when shooting in the studio, or taking indoor shots. It is also recommended for use when connecting the camera to your computer to transfer data.


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Sigma APO 300-800 mm HSM lens

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Ilse JurrienTuesday, September 26, 2006
Posted by: Ilse Jurrien

SAjmah has launched a new system of four-thirds compatible, ultra zoom lens large aperture; Sigma APO 300-800 mm f 5.6 EX DG HSM. This Sigma lens covers the field of view equivalent to 600 mm to 1600 mm when used on four thirds cameras. Continuously varying the angle of view, the lens takes a lot of movement of the feet out of the composition of photos. The latest technology of coating lens and lens design reduce flare and ghosting, a common problem with digital cameras. Two ELD glass elements in the front lens group reduces chromatic aberration to a minimum and also ensures optimal image quality. The total length of the lens does not change during focusing and zooming, ensuring convenient handling.

Sigma APO 300-800mm lens

Lens Sigma APO 300-800 mm f 5.6 EX DG HSM
HSM offers ultra quiet, high-speed auto focus as well as override manual focusing full time. This lens is designed to accept a 46 mm circular polarizer filter in a filter back support. The introduction of this new lens increases the line-up of Sigma lens for four thirds mount for a total of eleven models. With four thirds cameras, the focal length will be equivalent to 600-1600 mm.

Sigma DG HSM lens-specific
Type of Mount: four thirds
Minimum Aperture: F22
Lens construction: 16 elements in 18 groups
Viewing angle: 4.1-1.5
Number of Diaphragm Blades: 9pcs
Minimum focusing distance: 600cm (236.2)
Maximum magnification: 1: 6.9
Filter size: 46 mm (rear)
Lens Hood bayonet type:
Size: 156.5 mm (6.2) X length mm 549.4 (21.6)
Weight: 5915g/208.6 oz
No UPC: 0085126 595586


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2011年7月18日星期一

Sigma cameras at Photokina

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Dennis HissinkTuesday, September 30, 2008
Posted by: Dennis Hissink

SAjmah was also present at the Photokina 2008. In addition to the announcement of a series of new lenses, including the 24-70 mm f 2.8 EX DG HSM with a considerably smaller build than that of the lens of brilliant 24-70 mm Nikon, Sigma also announced the development of second generation DSLR and compact camera models. The Sigma SD15 and Sigma DP2 are both based on Foveon sensor 4.7 megapixel x 3; However, they will be equipped with a new processor called true II. This processor must ensure improved processing speed (e.g. for continuous shooting) and should increase the overall quality of the image. Sigma on display to the public behind glass both products.

Sigma cameras

Sigma DP2 compact camera
Behind the scenes, the press and traders have been able to admire a series of models of the SD15 and DP2 demo. The two cameras are still in a stage too early draw conclusions. Certainly we will come back to it, as they become available to full production models. The Sigma DP2 is equipped with a 24.2 mm lens f/2.8, equivalent to 41 mm on a 35 mm SLR camera. This focal length is able to offer more creative options and will be extremely interesting for the street photographer and nature. Two glass aspherical lenses should be able to offer high image quality. The Super multi-layer lens coating reduces flare and ghosting. This lens and SLR-sized image sensor combination provides natural shallow depth of field and attractive bokeh effect. According to the information we received, the Sigma DP2 will be available in February 2009.

Sigma cameras

Sigma SD15 DSLR
We do not know much about the Sigma SD15 yet, except that features the same Foveon sensor integrated in the SD14. In addition, the Sigma SD14 incorporates new true II image processing engine Sigma. Improved the speed of processing should ensure a faster playback of images on the screen. The size of the display on the back of the camera has increased from 2.5 to 3 inches. Moreover, the true II processor is expected to improve the signal to noise ratio and therefore generate less noise in the image. Sigma too adopts a different storage medium format.

Sigma cameras

Sigma booth at Photokina
Whereas the SD14 offered a slot for CompactFlash cards support, the new Sigma SD14 will support only SD and SDHC. Just a sample becomes available, you will also find its way to our DIWA test lab to undergo various tests. The Sigma SD15 will become available in April 2009, as far as we know. This will be after the PMA 2009 Show. See the complete Gallery Sigma at LetsGoDigital.

Sigma cameras

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Sigma DP1

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Ilse JurrienTuesday, September 26, 2006
Posted by: Ilse Jurrien

HeTSigma Corporation is pleased to announce the launch of the new, groundbreaking Sigma DP1 compact digital camera with a direct image sensor 14 Megapixel Foveon X 3 sensor (2652 1768 3 layers) as used in the Sigma SD14 digital SLR camera. Using three Silicon embedded layers of photo sensors stacked to take advantage of silicon's ability to absorb red light, green and blue at different respective depths. A 16.6 mm F4 lens with a wide-angle field of view equivalent to 28 mm on a 35 mm film, has been developed to maximize the image quality in conjunction with the image sensor to capture color. The Sigma DP1 14 Megapixel advanced compact digital camera features Sigma's True again, the only image processing engine.

Sigma DP1

Sigma DP1 camera-Foveon X 3 sensor
The Sigma DP1 uses the image sensor's superior technology to acquire accurate information, full color image. Sigma's True unique and powerful image processor is embedded the DP1, which allows you to manage large image sensor products 14 Megapixels and reproduce exceptional definition with picture quality on par with film. The Sigma DP1 is equipped with a large 2.5 inch TFT LCD monitor with image preview, making 100% confirmation of composition, focus and exposure quickly and easily.

Sigma DP1 camera features
Resolution of 14 Megapixels
Direct image sensor, Foveon X 3
High-resolution layers 2652 x 1768 x 3
Lens F/4 16. (28 m with 35 mm format camera)
New processing engine, the only real image

Sigma DP1

Compact camera Sigma DP 1-14-Megapixel sensor
The Sigma DP1 uses the image sensor's superior technology to acquire accurate information, full color image. Sigma's True unique and powerful image processor is the Sigma DP1, which allows you to manage large image sensor products 14 Megapixels and reproduce exceptional definition with picture quality on par with film. The Sigma DP1 is equipped with a large 2.5 inch TFT LCD monitor with image preview, making 100% confirmation of composition, focus and exposure quickly and easily. This compact point and shoot camera includes JPEG recording for the speed and convenience of a registration mode of raw data (X3F) for retaining full image capture detail of the highest quality.


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2011年7月17日星期日

Sigma DP1 hands-on

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Dennis HissinkMonday, October 2, 2006
Posted by: Dennis Hissink

During our meeting with Kazuto Yamaki, Chief Operating Officer, from Sigma Japan, I had the opportunity to touch and try the new Sigma DP digital compact camera. Although the status of the Sigma DP1 is pre-pre-pre-production, in the words of Kazuto Yamaki, already we can share our thoughts with you based on this template. The Sigma DP1 is compact and is basically similar to ordinary compact camera models. However the big difference between an ordinary compact camera and the Sigma DP1 is its image sensor.

Sigma DP1 hands-on

Sigma DP1 Foveon X 3 sensor
The Sigma DP1 incorporates Foveon X 3 image sensor as the Sigma SD14 digital SLR camera. And this is the only type of cause that any compact digital camera incorporates smaller image sensors, often smaller then before. Sigma is walking in the opposite direction and aims at providing a high-end compact digital camera. The Sigma DP1 produces large JPEG and RAW files produced by the 14 Megapixel sensor. At this stage we cannot conclude anything about the quality of the image or what so ever, because there are simply no image review.

Sigma DP1 hands-on

Sigma DP1-set the objective of 16.6 mm focal length f/4
The back of the camera shows a button taking a zoom function. However the introduction clearly states that the Sigma DP1 will not bring an optical zoom lens, only a fixed focal length of 16.6 mm, equivalent to 28 mm on a 35 mm f/4. It would have been nice to see a brighter lens on the DP1, but this would not be possible without changing the size of the camera. Therefore the brightness f/4 is a sort of compromise. The same applies to the integration of an optical zoom lens. The sensor in the Sigma DP1 is big, much bigger than other compact digital camera. To ensure exceptional quality lenses must be designed so that the light rays are falling straight onto the sensor. With smaller lenses, the rays are hitting the sensor into a corner. If we want straight rays in the sensor, the lens must be very great. Eventually this would make the Sigma DP1 too large. Then the zoom function of the buttons refer to a digital zoom. According to Kazuto Yamaki this is a surprisingly good alternative to the features of the Foveon X 3 image sensor.

Sigma DP1 hands-on

Sigma DP1 RAW data-& JPEG shooting
Because the Sigma DP1 Foveon sensor features, the user will be able to shoot in JPEG and RAW data (X3F). The RAW format will provide full image capture detail of the highest quality. The rear part of the Sigma DP1 has a 2.5 LCD monitor offering 100% Preview image. On top of the camera is a wheel with full settings p/a/S/M, to meet the demand of the serious photographer.

Sigma DP1 hands-on

Sigma DP1 for serious photographers
At this stage the Sigma DP1 is only available as a pre-production model, but the goal of Sigma will be leaving the Sigma DP1 compact camera becomes available around February 2007. The Sigma DP1 is developed for the photographer looking for a compact digital camera but without the need to make compromises on image quality. On the other hand the Sigma DP1 camera could also mean the first step to a future user SD14. By purchasing a DP1, the user can experience the quality of the Foveon technique without the need to buy a new system.


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