Cameras with longer battery life can take more photos before exhausting their batteries.
Special note: The measurement standard for battery life stipulates that if a camera has an internal flash, it must be used for 50% of photos taken. For this reason, comparisons of one camera with an internal flash to another without will not be comparable
Excellent 18-megapixel sensor with impressively low noise and superb detail; Very good high ISO performance, especially for 18-megapixel subframe sensor; Rugged construction with magnesium body and weather sealing; Fast autofocus and fast burst rate of 8 fps; Full HD (1920x1080) movies at 30/25/24p, 60/50p at 1280x720.
No dedicated AF-assist lamp (flash is used), and AF-assist adjustment is buried in the Flash Settings menu; Kit lens (28-135mm) isn't quite up to the resolving power of the 18-megapixel sensor, odd focal length for subframe DSLR; No continuous autofocus in Movie mode.
Excellent 18-megapixel sensor with superb detail; Very good high ISO performance, especially for 18-megapixel subframe sensor; 3.0-inch, 1,040K-dot Vari-angle LCD is very useful for video and Live View; Sharp 18-135 kit lens with above average zoom range and I.S.; Full HD (1920x1080) movies at 30/25/24p, 60/50p at 1280x720.
Body not as rugged as mag-alloy 50D; AF assist only works when flash is up, though flash can be forced off; Auto-exposure not reliable in very low light; No continuous autofocus in Movie mode.