Canon EF 24-105mm f/4L IS USM with EOS 400D/XTi, EOS 40D review Cameralabs vignetting results

More results : Outdoor / Resolution / Corner sharpness / Fringe and macro / Geometry / Vignetting

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Canon EF 24-105mm f/4L IS USM wide-angle uniformity using Canon 400D / XTi

Canon 24-105mm wide angle uniformity test

24-105mm EF L at 24mm f4
Mean corner fall-off: 84.4%

To measure and compare the Canon EF 24-105mm's vignetting and light fall-off on a cropped-frame body we photographed a white target with a highly diffused custom filter using it and a number of rival lenses.

The lenses were tested at their widest focal lengths with the aperture wide open in Aperture Priority mode.

The images were analysed with Imatest and the full areas presented here at a reduced resolution. Bigger percentages are better.

The image above was taken with the Canon EF 24-105mm lens on the Canon EOS 400D / XTi body at 24mm f4. Here the light falls off in the corners to an average of 84.4% of the centre measurement, which means you'll barely notice any darkening in the corners with this lens when zoomed-out on a cropped-frame body. In contrast, the EF-S 18-55mm kit lens and EF-S 17-85mm exhibit more noticeable darkening in the corners, especially the latter. Of course this is one of the benefits of using a full-frame compatible lens on a cropped-frame body, something you'll also see with the EF 17-40mm.

Canon EF-S 17-85mm f/4-5.6 IS USM	Canon EF-S 18-55mm f/3.5-5.6	Canon EF 17-40mm f/4.0L USM

17-85mm EF-S at 17mm f4 Mean corner fall-off: 57.8%	18-55mm EF-S at 18mm f3.5 Mean corner fall-off: 68.8%	17-40mm EF L at 17mm f4 Mean corner fall-off: 79.4%

Canon EF 24-105mm f/4L IS USM telephoto uniformity using Canon 400D / XTi

Canon 24-105mm telephoto uniformity test

24-105mm EF L at 105mm f4
Mean corner fall-off: 83.6%

To measure and compare the Canon 24-105mm's vignetting and light fall-off on a cropped-frame body we photographed a white target with a highly diffused custom filter using it and a number of rival lenses.

The lenses were tested at their longest focal lengths with the aperture wide open in Aperture Priority mode.

The images were analysed with Imatest and the full areas presented here at a reduced resolution. Bigger percentages are better.

The image above was taken with the Canon EF 24-105mm lens on the Canon EOS 400D / XTi body at 105mm f4. Here the light falls off in the corners to an average of 83.6% of the centre measurement, which again means you'll barely notice any darkening in the corners with this lens when zoomed-in on a cropped-frame body.

While you'd expect a full-frame compatible lens to perform well in this regard on a cropped-frame body, the other models we've compared it to also exhibit little darkening in the corners when they're zoomed-in. Either way, vignetting / light fall-off is not an issue with the EF 24-105mm when mounted on a cropped-frame body. This is in some contrast to its performance on a full-frame body, where the vignetting can be quite apparent - see this page. Now let's move onto our sample images gallery.

Canon EF-S 17-85mm f/4-5.6 IS USM	Canon EF-S 18-55mm f/3.5-5.6	Canon EF 17-40mm f/4.0L USM

17-85mm EF-S at 85mm f5.6 Mean corner fall-off: 77.5%	18-55mm EF-S at 55mm f5.6 Mean corner fall-off: 83.8%	17-40mm EF L at 40mm f4 Mean corner fall-off: 82.2%

Canon EF 24-105mm with EOS 400D / XTi results

Outdoor / Resolution / Corner sharpness / Fringe and macro / Geometry / Vignetting

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