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Canon EF 24-105mm f/4L IS USM review tested with Canon EOS 5D Gordon Laing, June 2006 / updated August 2007

Canon 24-105mm results : Outdoor / Resolution / Corner sharpness / Fringe and macro / Geometry / Vignetting



Click here for the Canon EF 24-105mm lens
Canon EF 24-105mm geometry, wide angle, tested with EOS 5D

To measure geometric distortion we photographed a chart consisting of a grid pattern with perfectly straight lines. The lenses were tested at their widest focal lengths with an aperture of f8 using a Canon EOS-5D in Aperture Priority mode. The images were analysed with Imatest using 5th Order line calculation and the full areas presented here at a reduced resolution.

We expect to find barrel distortion increasing with wider angles, so weren't surprised to find the EF 17-40mm at 17mm present the highest distortion. The big surprise here though is the result from the EF 24-70mm, see center. It exhibits significantly lower barrel distortion at wide angle than the EF 24-105mm at its widest setting.

Canon EF 24-105mm f/4L IS USM
Canon EF 24-70mm f/2.8L USM
Canon EF 17-40mm f/4.0L USM
24-105mm at 24mm f8
Distortion: 5.29% barrel
  24-70mm at 24mm f8
Distortion: 1.86% barrel
  17-40mm at 17mm f8
Distortion: 6.39% barrel


Canon EF 24-105mm geometry, telephoto, tested with EOS 5D

To measure geometric distortion we photographed a chart consisting of a grid pattern with perfectly straight lines. The lenses were tested at their longest focal lengths with an aperture of f8 using a Canon EOS-5D in Aperture Priority mode. The images were analysed with Imatest using 5th Order line calculation and the full areas presented here at a reduced resolution.

Zoomed-in to their longest focal lengths, the EF 24-105mm and EF 24-70mm share similar levels of pincushion distortion. The impressive result here comes from the EF 17-40mm though, which at 40mm exhibits very little geometric distortion what-so-ever.

Canon EF 24-105mm f/4L IS USM
Canon EF 24-70mm f/2.8L USM
Canon EF 17-40mm f/4.0L USM
24-105mm at 105mm f8
Distortion: 1.62% pincushion
  24-70mm at 70mm f8
Distortion: 1.82% pincushion
  17-40mm at 40mm f8
Distortion: 0.44% pincushion

Canon 24-105mm results continued...

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


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