Sigma SD10
From Wikipedia, the free encyclopedia
| Sigma SD10 | |
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| Type | Digital single-lens reflex |
| Sensor | 20.7 mm x 13.8 mm Foveon X3 sensor |
| Maximum resolution | 2268 × 1512 × 3 (10.2 million photoelements) |
| Lens type | Interchangeable (Sigma SA mount) |
| Shutter | electronic focal-plane |
| Shutter speed range | 30 s to 1/4000 s |
| Exposure Metering | TTL, full aperture, zones |
| Exposure Modes | Programmed, shutter-priority, aperture priority, manual |
| Metering modes | 8-segment evaluative, spot, Center-weighted average |
| Focus areas | 1 point |
| Focus modes | One-shot, Continuous, Manual |
| Continuous Shooting | up to 2.5 frame/s |
| Viewfinder | Optical, pentaprism |
| ASA/ISO range | 100–1600 in 1 EV steps |
| Flash | none, sync at 1/180 second |
| Custom WB | 6 presets, auto, and custom |
| Rear LCD monitor | 1.8-inch (45 mm), 150,000 pixels |
| Storage | CompactFlash(CF) (Type I or Type II) and MicroDrive(MD) |
| Battery | 4xAA NiMH or 2xCR-V3 |
| Weight | 785 g (body only) |
The Sigma SD10 is a digital SLR camera produced by the Sigma Corporation of Japan. It was announced on October 27, 2003 and is an evolution of the previous SD9 model, addressing many of the shortcomings of that camera. The Sigma cameras are unique in the digital SLR field in using full-color sensor technology, and in that they only produce raw format images that require post-processing on a computer.
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[edit] Foveon X3 image sensor
Like its predecessor, the SD10 uses a sensor built with the unique Foveon X3 technology. The 10.2-million-value raw file from this sensor produces a 3.4 Megapixel image file. Although this file has fewer pixels than images from most competing cameras, it is made from more measured data values, since the Foveon sensor detects full color data (three values) at each site, whereas the common Bayer sensor detects only one primary color at each location and must interpolate the other colors from neighboring sensor sites. Sigma and Foveon count the red, green, and blue sensors at each site separately to claim the camera has 10.2 million pixels; similarly, companies selling Bayer-sensor cameras count single-color sensor elements as pixels.
[edit] Raw output only
Unlike all other digital SLR cameras currently on the market, the SD10 performs no in-camera processing to common image formats such as JPEG and TIFF. Instead, it saves images in its own .X3F format, which retains all the information the camera captured. Processing on a computer is required to use these files. Sigma provides the Foveon-written SIGMA Photo Pro application for this purpose; in addition, Adobe Photoshop CS2 supports the format, as do several other image-processing applications.
[edit] Shooting modes
The camera supports single-shot, continuous, 2 or 10 second self-timer, mirror lock-up and auto exposure bracketing.
[edit] Metering modes
4 different metering modes are supported: aperture priority (A), shutter speed priority (S), manual (M) and program automatic (P).
[edit] Lens availability
The SD10 supports only Sigma's SA mount lenses. Only Sigma produces lenses to fit this mount, although their range is fairly broad. Third-party converters exist for a number of other lens mounts, although no automatic features are supported.
[edit] Pros and cons
The SD10 is an unusual camera with both advantages and disadvantages compared to most other digital SLRs, and tends to polarise opinion. It has a fiercely loyal base of support and some rather vocal detractors. Commonly cited advantages and disadvantages of the camera include the following:
[edit] Pro
- Excellent color in daylight and good light.
- Excellent detail, comparable to 6.5 MP Bayer-sensor DSLR cameras.[1]
- Noise-free images at low ISO speeds.
- No moire effects when photographing high-detail patterns; thus no need for sharpness-destroying filters to reduce moire effects.
- High-quality PC software allows images to be tuned easily to the best quality.
- Takes easily-obtained AA or CR-V3 batteries instead of proprietary format.
- Dust protector stops dust entering the camera while changing lenses.
- Sports finder allows viewing area outside picture area, letting photographer see if a better composition could be made by zooming out.
- Inexpensive when it can still be found, late 2005.
- Shooting-priority user interface means always ready to shoot.
- Unique histogram feature shows distribution of RGB values in zoomed-in area of image.
[edit] Con
- Does not produce JPEG files in-camera.
- Large (8 MB) raw files mean fewer photographs per image card.
- Slow to clear the shot buffer.
- Originally expensive, listing at $1599 in U.S.
- Only takes Sigma lenses; no third party support except via adapters.
- Poor low-light performance; high-ISO modes produce noisier images.
- Image quality degrades in long exposures (over 4 seconds).
- No built-in flash.
- Single autofocus sensor instead of three or more in competition.
