Canon PowerShot G9

Canon EOS Rebel XSi

Canon Speedlite 430EX, 430EX II, 580EX, and other E-TTL and E-TTL II flash systems. Flashes slide onto the hot shoe, but are quite bulky on the small camera.

Canon Speedlite 430EX, 430EX II, 580EX, and other E-TTL and E-TTL II flash systems.

HF-DC1 PowerShot flash accessory flashes light up to 23 feet, and hooks onto the side of the camera rather than on the hot shoe. $129.

ACK-DC20 AC adapter kit plugs into an outlet and costs $70.

CA-PS700 power adapter

Wide and telephoto conversion lenses are available for $149-199 and will require a $25 lens adapter.

A wide range of EF and EF-S lenses and lens filters are available.

WP-DC21 waterproof case costs $240 and requires a $34 weight, but can take the camera to depths of 130 feet.

RS-60E3 remote switch comes with long cable and plugs into the side of the camera for those moments when your finger can’t be on the shutter button. A wireless remote is also available. Each remote costs $30.

NB-2LH rechargeable lithium-ion battery pack costs $70.

LP-E5 rechargeable lithium-ion battery pack is $70.