Canon has upgraded its range of small, design-conscious Ixus digital cameras - boosting the performance from the smallest of the range and adding titanium and wide-angle models.

The Digital Ixus i7 zoom upgrades the tiny Ixus i zoom, adding a 7.1-megapixel CCD. The camera measures 96-x-45-x-24mm and has a 2.4x optical zoom lens.

The Ixus i7 features Canon's DIGIC III image processor, which has noise reduction technology and face-detection autofocus and auto-exposure tools. These can spot up to nine faces within a frame and automatically use fill-in flash to correctly expose both the subjects and background.

A Safety Zoom function allows you to zoom in on an area within a picture, reducing the resolution of the image accordingly. 17 shooting modes are supported, including special scene modes and movie modes.

The Digital Ixus i7 zoom costs £210 plus VAT.

Tougher than steel

The Digital Ixus 900 Ti has a precision-crafted titanium shell with a touch control dial. It has a 10-megapixel CCD and a 3x optical zoom lens, with a 2.5-inch LCD screen.

The same DIGIC III image processor as the Ixus i7 - which features noise reduction and face-detection technology - and Safety Zoom function are included. The camera costs £340 plus VAT.

The Digital Ixus 850 IS is the first Ixus model to offer a wide-angle lens, which has a 3.8x rating and includes optical stabilization to reduce camera shake. It supports ISO ratings up to 1600, has a 2.5-inch LCD screen and offers the same DIGIC III and Safety Zoom as the other new models.

The camera costs £315 plus VAT.