Luminous Landscape have reviewed the new Canon EF 24-105mm f/4L IS USM lens, which features a fixed aperture of f/4 throughout the zoom range and an Image Stabiliser that allows shutter speeds of 3 stops slower than normal.

“Of course the reduction in maximum aperture from f/2.8 to f/4 is a loss, but not as big as it once would have been. The current generation of Canon digital cameras produce remarkably clean and noise free images right through ISO 400, and so unlike in the days of film there is not much lost when using a slower lens by jacking up the ISO. On the other hand the reduction in size and weight is undeniable. In the 10 days that I’ve owned the lens I’ve been out shooting for several 4-6 hour sessions, and each time have appreciated the reduced bulk and weight over the 24-70mm.”

Website: Luminous Landscape - Canon EF 24-105mm f/4L IS USM Lens Review