如题，见
http://www.dpreview.com/news/1002/10020806canoneos550d.asp
Features at a glance:

■18 Megapixel APS-C CMOS sensor
■DIGIC 4 processor with ISO 100-6400 (Expansion to 12800)
■Continuous shooting at 3.7fps
■Full HD movie recording with manual control and selectable frame rates
■7.7cm (3.0”) 3:2 Clear View LCD with 1,040k dots
■iFCL metering System with 63-zone Dual-layer Metering Sensor
■Quick Control screen to change shooting settings
■Exposure compensation +/-5 stops.
■Select maximum value for Auto ISO
■External Microphone socket
■Movie crop function
■Eye-Fi connected functions compatibility

入门机也很强悍！