This grapefruit-sized behemoth is a very special purpose lens designed for people who intend to use it wide open most of the time, and are willing to pay for that in many ways. You people know who you are. If you have to ask, then this lens isn't for you. If you know who you are and think you need one of these, go get one today. Its optics are extraordinary, even wide open.

The G10 is a camera you don't want to put down once you have picked it up. It encourages users to take pictures, and turn the dials: to experiment and have fun. This is one heck of a fun camera to use. In the hand, it inspires confidence with solid construction and secure and comfortable hand grip. The G10 quickly becomes second nature to use, which is not something that can be said of many compacts.

The Digital Rebel XSi viewfinder is slightly larger than that of the XTi, but slightly smaller than that of the EOS 40D/50D. The difference from the XTi is fairly small and you might not even notice it unless you compared the cameras side by side. The XSi viewfinder also seems slightly brighter than that of the XTi, but again the difference is small.

The PowerShot G10 remains a superb compact camera. It’s built like a brick yet comfortable to use, boasts full manual control along with a flash hotshoe and RAW recording, has an excellent looking screen, a flexible zoom range with wide angle capabilities and decent stabilisation, and the potential to deliver images packed with detail.

It is easy to see that Canon has done something amazing with all those pixels it crammed into that small sensor. In a well lit, well exposed photo taken at low ISO, the image quality is so good that I was caught off guard. I kept checking to make sure I was looking at the photos from the G10 and not my 5D or 1Ds.