The SD series is a slightly higher level version of the A series. They have nice metallic-looking rounded bodies. They have a very pocketable size, and they feel very good in the hand. Their battery life is somewhat a limitation due to their size and their batteries are generally tiny things with external chargers. These cameras can make for a great walk around point and shoot, or a platform for a more involved level of tinkering. With a big enough external battery they could make for a great motion detection photo system, and their small size means that you could tuck them in a dark corner and unobtrusively capture a timelapse or two.
Not linked – SD850
As with every camera purchase, you’ll need to make sure that you end up with an appropriate memory card (or two), a battery, and charger. If you buy new this is less of a concern, but a lot of these cameras are only really available on the used market so keep an eye out for what accessories are bundled with the camera.
CHDK compatible Powershot A series cameras
CHDK compatible Powershot ELPH series cameras
CHDK compatible Powershot S series cameras
CHDK compatible Powershot SD series cameras
CHDK compatible Powershot SX series cameras
CHDK compatible Powershot G series cameras