Style
The SX10 is styled very similarly to the S5. Consumers who have previously used the S5 will find that the appearance of the SX10 is much the same as the S5. The SX10 is perhaps a third of an inch larger in all directions. The LCD screen is the same size on the SX10 as on the S5, however the resolution has been upgraded.
Interface
One major difference between the SX10 and the S5 is that the rear panel controls on the SX10 are completely redone. The AF-assist lamp feature has been completely removed. The camera's internal processor has also been upgraded for faster auto focus tracking and face detection.
Photo Quality
Another feature that has been upgraded is the digital camera sensing chip. The SX10 carries Canon's newest CCD image sensor. This sensor is larger than the sensor in the S5. The result is a larger, more detailed photography file. Also improved is the megapixel capability in the SX10. Unlike the 8-megapixel S5, the SX10 has a 10-megapixel capability. This is part of the reason that the camera is named SX10.
Zoom
The zoom lens has been increased from a 12X optical zoom to a 20X optical zoom. A camera's optical zoom is the actual, physical zoom capability. A larger zoom means clearer, closer photos. The camera's wide-angle feature has increased to 28mm wide, while the zoom will reach up to 560mm telephoto. The camera's image stabilization capability is an important function that assists this powerful telephoto capability. At its widest setting, the camera aperture can be set to F 2.8 for low light photography.
ISO, Shutter Speed and Metering
The camera's standard ISO range (the digital equivalent of film speed) is the same on the SX10 as on the S5. The lowest setting for ISO is still 80, and the highest ISO setting is 1600. However, a pre-set scene mode will allow the camera to shoot at ISO speeds as high as 3,200. Shutter speeds and metering modes are also unchanged on the SX10.