| Canon EF 24-105mm f/4 L IS USM Specifications | |
| Frame Coverage | 35mm |
| Lens Construction (groups) | 13 |
| Lens Construction (elements) | 18 |
| No. of Diaphragm Blades | 8 |
| Minimum Aperture | 22 |
| Closest Focusing Distance | 0.45m (17.7") |
| Maximum Magnifcation | 0.23x |
| Filter Diameter | 77mm |
| Maximum Diameter x Length | 83.5mm x 107mm (3.3" x 4.2") |
| Weight | 670g (23.6oz) |
Reviews
Source
BayImages.net
This is a a fantastic general purpose lens well suited for travel photography. Although there is slight softness towards the edges when the lens is shot wide open at f/4, stopping down results in a very good image. With image stabilization, using the smaller f-stops is feasible with good hand-holding technique in less than optimal lighting conditions.
Bob Atkins
The EF 24-105/4L IS USM is a very nice lens indeed. On a full frame DSLR like the EOS 5D, it has an ideal focal length range for a single general purpose lens, with applications ranging from landscapes to portraits. It can be used wide open at f4 and still yield very sharp images and with the 3 stops of stabilization which the IS system provides, it's useful for low light work as well.
Ken Rockwell
The Canon 24-105mm f/4L has great optics and works extremely well. My biggest whine is that the zoom ring takes a lot of effort and that the wide end of the zoom range is cramped, making it difficult to set wide focal lengths precisely.
Photo.net
The Canon 24-105/4L IS lens is reasonably high quality, reasonably fast, reasonably wide range, and reasonably light. It is designed for the latest generation of full-frame digital SLRs such as the Canon EOS 5D.
PhotoZone.de
The resolution results beat those from the EF 24-70mm f/2.8 USM L and match the EF 28-70mm f/2.8 USM L with its much more conservative zoom range (but higher speed). There's a slight decrease in performance at 105mm but even here the quality remains on a very high level.
CameraLabs.com
The lens performed well across its range, particularly in terms of corner sharpness at wide angle, while essentially matching our EF 85mm f1.8 prime in terms of resolving power.
William Castleman
The two expensive L-zoom lenses predictably outperformed the consumer quality EF 28-135mm lens on many tests. However, the differences in image quality that end up being visible in a print are surprisingly small.
Peter Kun Frary
Highly recommended for serious amateurs, doctors, lawyers and world trekkers. Not recommended for those wishing to travel light, sports photographers or those with a feeble credit card limit.
The-Digital-Picture.com
Boasting the superb build, mechanical and optical quality of the Canon L-Series Lenses and a widely used range of focal lengths, the Canon EF 24-105mm f/4 L IS USM Lens is one of the best and most popular Canon general purpose lenses made.
Luminous-Landscape.com
For the past year I have been using the 28-135 IS USM because it is relatively inexpensive, portable, has good zoom range and is an eminently decent quality lens. Along came the 24-105 offering portability (only a wee bit heavier than the 28-135), good zoom range and top quality at three times the price.

