AF-dedicated CMOS sensor AF Points 45-point (19 high-precision cross-type AF points plus 26 Assist AF points) AF Working Range EV -1 18 (ISO 100 at 73°F/23°C) Focusing Modes Autofocus (One-Shot AF, Predictive AI Servo AF), Manual Focus (MF) AF Point...

• -Canon EOS 40D Specifications

this is definitely an advantage, because even though a built-in flash is not as good as an external unit, having a small flash that's always available can save the day when light is very poor and you haven't brought your dedicated flash unit along. It also...