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Canon EF 24-105mm f/4L IS USM, (tested with cropped-frame APS-C body) Gordon Laing, March 2008

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

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

  To measure and compare the Canon 24-105mm's corner sharpness on a cropped-frame body we photographed the Enhanced Digital Camera Resolution Chart with it and a number of lenses using a Canon EOS-400D / XTi. The 400D / XTi was set to Large Fine JPEG mode and its Standard Picture Style.

Each lens was tested at its widest and longest focal lengths and with various apertures using Aperture Priority mode. The crops are taken from the lower left corner of the chart and presented here at 100%. The wide angle crops show a slightly larger area of the chart because the minimum focusing distances forced us to shoot from a little further away. No crops have been resized.

The Canon EF 24-105mm is designed for use on a full-frame body, so by mounting it on a cropped-frame model, you'd expect it to perform better in these less extreme corner areas. As you can see from the crops below, the EF 24-105mm isn't perfect with a little fringing apparent when zoomed-out, but it clearly out-performs both EF-S lenses in this first test. The other full-frame lens, the EF 17-40mm also shows an advantage here.

With all four lenses zoomed-in, the playing field becomes much closer. There's some softness on the EF 24-105mm with its aperture wide open, but otherwise the results are good. That said, the EF-S 17-85mm delivers a better esult here when its aperture is wide open. In the meantime, the Canon EF-S 18-55mm kit lens is looking soft here. Now let's take a look at the fringing and macro results.


Canon EF 24-105mm f/4.0L USM
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
Canon 24-105mm EF L at 24mm f4
Canon 17-85mm EF-S at 17mm f4
Canon 18-55mm EF-S at 18mm f3.5
Canon 17-40mm EF L at 17mm f4
24-105mm EF L at 24mm f4
17-85mm EF-S at 17mm f4
18-55mm EF-S at 18mm f3.5
17-40mm EF L at 17mm f4
Canon 24-105mm EF L at 24mm f8
Canon 17-85mm EF-S at 17mm f8
Canon 18-55mm EF-S at 18mm f8
Canon 17-40mm EF L at 17mm f8
24-105mm EF L at 24mm f8
17-85mm EF-S at 17mm f8
18-55mm EF-S at 18mm f8
17-40mm EF L at 17mm f8
Canon 24-105mm EF L at 24mm f16
Canon 17-85mm EF-S at 17mm f16
Canon 18-55mm EF-S at 18mm f16
Canon 17-40mm EF L at 17mm f16
24-105mm EF L at 24mm f16
17-85mm EF-S at 17mm f16
18-55mm EF-S at 18mm at f16
17-40mm EF L at 17mm f16
             
Canon EF 24-105mm f/4.0L USM
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
Canon 24-105mm EF L at 105mm f4
Canon 17-85mm EF-S at 85mm f5.6
Canon 18-55mm EF-S at 55mm f5.6
Canon 17-40mm EF L at 40mm f4
24-105mm EF L at 105mm f4
17-85mm EF-S at 85mm f5.6
18-55mm EF-S at 55mm f5-6
17-40mm EF L at 40mm f4
Canon 24-105mm EF L at 105mm f8
Canon 17-85mm EF-S at 85mm f8
Canon 18-55mm EF-S at 55mm f8
Canon 17-40mm EF L at 40mm f8
24-105mm EF L at 105mm f8
17-85mm EF-S at 85mm f8
18-55mm EF-S at 55mm f8
17-40mm EF L at 40mm f8
Canon 24-105mm EF L at 105mm f16
Canon 17-85mm EF-S at 85mm f16
Canon 18-55mm EF-S at 55mm f16
Canon 17-40mm EF L at 40mm f16
24-105mm EF L at 105mm f16
17-85mm EF-S at 85mm f16
18-55mm EF-S at 55mm f16
17-40mm EF L at 40mm f16

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

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