Just Posted: Our Canon PowerShot G15 review. The G15 is one of the latest wave of updated enthusiast compact cameras and it follows this season's trend of gaining a brighter lens and CMOS sensor in the process. It still offers a 28-140mm equivalent lens range but its maximum aperture range has been pushed to F1.8-2.8 - a whole stop faster, throughout its range, than the older G12. It's lost that camera's flip-out screen but has lost bulk in the process and has retained that rarest of things - an optical viewfinder. Will this makeover of the G-series formula be enough to win back its place at the top of the heap? Read our review to find out.