Canon has announced a 4 megapixel follow-up to the PowerShot A510 in the form of the adeptly named PowerShot A520.

The small compact model features a 4x optical zoom, 20 shooting modes, VGA movies, a zoom flash, extended direct print functions via Canon's print and share button and an optional waterproof case and adaptor lenses.

13 percent smaller and 20 percent lighter than its predecessor - the PowerShot A85 - the PowerShot A520. The 35-140mm (35mm equivalent) f/2.6-5.5 zoom lens also features a new rear-focus system for more efficient focus that limits power consumption. A redesigned flash unit, optical viewfinder, and a move from Compact Flash to SD memory card also contribute to a lighter, more elegant and compact body.

Scene modes include 'fireworks', 'foliage', 'beach', 'snow', 'underwater' (for use with the camera's optional 40m depth case) ‘kids and pets' and ‘night snapshot'. Movie clips of up to three minutes can be recorded, complete with sound and with the option to cut and edit in-camera. Manual mode allows more experienced or adventurous users to take control of settings such as white balance, exposure compensation and shutter speed.

A new ‘Hold' function will allow users to extend the display of newly shot images on the 1.8in LCD indefinitely, and to delete them immediately if necessary without the requirement to switch to replay mode. When the shutter button is pressed again, the camera returns to shooting.

The PowerShot A520 will be available from late February for £239.