SD9官方介绍（繁体）
http://www.sigma.net.tw/sd9.htm

E文评测，那位翻译一下？！
http://www.dpreview.com/reviews/sigmasd9/

Conclusion - Pros
The best resolution per output pixel we've ever seen, X3 lives up to the hype
The first digital camera to offer true single pixel resolution, goes beyond Nyquist frequency
Resolution of enlarged images virtually indistinguishable from six megapixel Bayer D-SLR
Relatively good tonal balance although default curve can be a little contrasty
Color accurate if a little under-saturated, especially foliage greens
Good automatic white balance, pre-programmed WB settings work well
Nice channel split histogram, can magnify in histogram mode
Undelete feature (recover last image deleted)
Fast operation, good startup / operation time, slightly slow CF write performance
Auto focus relatively fast, worked well even in lower light levels
Sigma Photo Pro RAW conversion software is superb, lots of adjustment and all in real-time
Firewire (IEEE 1394) and USB connectivity
Well designed LCD cover (allows access to delete button)
Easy to understand control layout
Dust protector
IBM Microdrive compatible
Once familiar the sports finder is useful, especially horizontal / vertical alignment

Conclusion - Cons
No in-camera JPEG, storage implications of shooting RAW
Color clipping / gray halos - not clear if a sensor or Photo Pro issue
Unnatural blue skies / chromatic aberration sensitivity - linked problems? *
Disappointing long exposure performance
Limited sensitivity, some softness at higher ISO, noise higher in red hues
Long exposures limited to one second at ISO 200 and 400
Half-stop exposure compensation / adjustment can feel limiting
Awkward power solution (two different sets of batteries)
Heavier and bulkier than some of the competition (although never feels too big)
Sigma QC should ensure no dust on sensor from factory
Continuous shooting rate limited to 2 frames per second at Hi resolution
No onboard PC Sync flash socket (req. optional adapter)
Photo Pro JPEG output quality issue
First of a kind
* We will be updating this review after testing the camera with a UV filter, however will still be of the opinion that this should have been addressed in-camera


Overall conclusion
Foveon (a previously not-so-well-known technology company) and Sigma (never before produced a digital camera) have had the guts and innovation to come to a very aggressive and critical market with a totally new concept in digital image capture. They have made the first step in what must be seen as a revolution in digital photography.

Nobody can doubt that the X3 sensor is capable of doing much of what the hype promised, capture single pixel resolution, single pixel color. Indeed, in our tests it managed to perform beyond our expectations in matching the EOS-D60 for resolution. Time after time you find yourself opening images in Photo Pro, gliding the magnifying loupe over the preview and gasping at the incredible detail this camera can 'see'.

Always shooting RAW requires a change of mindset, most other digital SLR's provide image parameter control in-camera, this means you shoot a virtually finished image (JPEG) which is ready to use as soon as you can transfer it to a computer. Digital photography with the SD9 is a two stage process, firstly the photographic step of actually taking the shot, then processing each image. Thankfully the supplied Photo Pro software is excellent at this. At first you think you will simply process all your images with 'Default' or 'Auto' settings but soon the application draws you in to experimenting with its flexibility and you realize how much can be achieved with this tool. Foveon deserve credit for this software alone.

That's not to say this "first of a kind" isn't without its problems. Sensitivity is limited and image sharpness and color response seem to drop off at higher ISO's. More serious is the tendency to clip color in a highlight, something I've described as "color clipping" and "gray halos". At this stage it's unclear if this is a sensor issue, a Photo Pro processing issue or a combination of the two. We're hoping Sigma / Foveon will be able to issue some kind of fix on this issue. For the time being shooting carefully so as to avoid overexposure is the key.

The future success or otherwise of the X3 sensor depends on Foveon's abilities to address these issues and to continue to strive forwards with development. Sigma should be proud of the SD9 and what it's capable of, but my hope and the hope of many other photographers is that the other major camera manufacturers will now take steps to evaluate the Foveon X3 for themselves.

Recommended

So which one should I buy? A question I get asked several times a day, and I wouldn't like to say. In a new addition to my reviews (after the amount of feedback I normally get) I've added a link to a specific forum in which you can discuss the review or ask me specific questions which I've not answered in these pages.