This comes from a dude that seems to be right a lot lately.
* 21.1 MP 1.0x
* DIGIC IV
* ISO 100-6400 L:50 & H:12800
* 5 FPS
* 3.2" High Resolution Screen (LCD)
* 19 point AF
* HDMI Out
* Liveview
* HD Movie Mode
* Viewfinder: 100% Coverage
* Full weather sealing
* EF Lenses only
bringing the amplifiers closer to each pixel, changing micro-circuit configuration and lowering voltages so the sensor runs colder
CMOS電路改進讓CMOS運作時較低溫,降低雜訊
Better digital noise reduction
Note Chuck Westall’s announcement that the 50D sensor has 1 to 1 and a half stops better noise than the 40D sensor despite the smaller pixels
50D雜訊表現會比40D好上1至1.5欓