刚在无忌看到：适马好样的X3传感器旗舰单反出来了——Sigma SD1 ，大家快到DP上看，还有几个镜头。这可是4千6百万像素X3传感器哦！
camera specifications
Format Interchangeable lens SLR camera
Storage Media Compact Flash (Type I, UDMA compatible)
Image Sensor Size 24 x 16mm (1.5x APS-C)
Lens Mount SIGMA SA bayonet mount
Compatible Lenses SIGMA SA mount interchangeable lenses
Image Sensor X3 direct image sensor (CMOS)
Effective Pixels 46MP (4,800×3,200×3 layers)
Aspect Ratio 3:2
Viewfinder Type Pentaprism SLR viewfinder
Viewfinder Frame Coverage 98% vertical, 98% horizontal
Viewfinder Magnification 0.95x (with 50mm lens at infinity)
Eye point 18mm
Diopter Adjustment Range -3.0 dpt - +1.5 dpt
Auto Focus Type TTL phase difference detection system
AF Point 11 points twin cross sensor
AF Operating Range EV -2 to +19 (ISO100)
Focus Mode • Single AF
• Continuous AF (with AF motion prediction function)
• Manual
Focusing Screen Fixed, all matt screen
Mirror Quick return
Depth of Field Preview Yes
AF Point Selection • Automatic Selection
• Manual Selection
Active AF point indicator Superimposed in viewfinder
Focus Lock Shutter Release Halfway-Down position
Built-in Flash • Manual Pop-up Built-in flash
• GN11
• 17mm lens angle covered
Flash Metering System S-TTL Auto Flash
Flash Compensation ±3EV (1/3 stop increments)
Flash Sync Terminal Available
Flash Connectivity Hot shoe (contact X synchronization at 1/180 sec. or less, with dedicated flash linking contact)
LCD Monitor • 3.0" TFT colour LCD monitor
• Approx. 460,000 Pixels
Dimensions 145.5 mm/5.7" (W) × 112.5 mm/4.4"(H) × 80.0 mm/3.1"
Weight TBA

http://www.nphoto.net/news/2010-09/21/27fddcdf8dfa328e.shtml

1500万像素，这个配置放C/N就够，放适马就有点不给力了，难以吸引眼球

究竟如何？得靠市场来检验~~~

转帖蜂鸟网“慕尼黑四圆柱”网友的观点：


实际像素不假，因为实际就是那么多像素

但实际像素并不代表输出像素，输出像素要除以3

这是X3特殊的原理导致的

色彩层次应该不错，X3像素色彩是“叠”出来的，而其它的CCD、CMOS的像素色彩是“拼”出来的。FOVEON X3传感器还是有先天优势的，不过FOVEON的高感研发太慢，现在的CMOS动辄25600甚至51200了！

标榜4600万像素，那么实际图片的像素是多少？

既然是X3的来的，那就除3吧。

其实主要还是看输出像素。 1500W也就不错了。