Ganz einfach, die Deutsche Canonwebseite hat falsche werte drin, wie auch bei abdichtung und co.
Hier mal auszug aus der US Seite:
Canon 50D
Autofocus
Type
TTL-CT-SIR AF-dedicated CMOS sensor
AF Points
9 (Cross-type)
Metering Range
EV 0.5-18 (at 73°F/23°C, ISO 100)
Focusing Modes
Auto, One-Shot AF, Predictive AI Servo AF, AI Focus AF, Manual focusing (MF)
AF Point Selection
Automatic selection, manual selection
Selected AF Point Display
Superimposed in viewfinder and indicated on LCD panel
AF-assist Beam
Small series of flashes fired by built-in flash
Effective range: Approx. 13.1 ft./4.0m at center, approx. 11.5 ft./3.5m at periphery
Link:
http://www.usa.canon.com/consumer/c...ategoryid=139&modelid=17499#ModelTechSpecsAct
Hier die 500D
Autofocus
Type
TTL-CT-SIR AF-dedicated CMOS sensor
AF Points
9 AF points (center AF point is cross-type)
Metering Range
EV -0.5-18 (at 73°F/23°C, ISO 100)
Focusing Modes
Auto, One-Shot AF, Predictive AI Servo AF, AI Focus AF, Manual Focusing (MF)
AF Point Selection
Automatic selection, manual selection
Selected AF Point Display
Superimposed in viewfinder and indicated on LCD monitor
AF-assist Beam
Intermittent firing of built-in flash
Effective range: Approx. 4.0m/13.1 ft. at center, approx. 3.5m/11.5 ft. at periphery. When EOS-dedicated Speedlite attached, the Speedlite's AF-assist beam is emitted instead.
Link:
http://www.usa.canon.com/consumer/c...ategoryid=139&modelid=18385#ModelTechSpecsAct