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Notice to Canon 40D Owners by Sigma

A free upgrade service to Canon EOS 40D users who are using Sigma’s APO 120-400mm F4.5-5.6 DG OS HSM or APO 150-500mm F5-6.3 DG OS HSM lenses is being offered by Sigma.

Tanya Palta
Written by Tanya Palta

Updated October 2, 2014

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A free upgrade service to Canon EOS 40D users who are using Sigma’s APO 120-400mm F4.5-5.6 DG OS HSM or APO 150-500mm F5-6.3 DG OS HSM lenses is being offered by Sigma.

Many users are reporting that when the Canon 40D digital SLR is in AI Servo AF mode, and the APO 120-400mm F4.5-5.6 DG OS HSM for Canon or APO 150-500mm F5-6.3 DG OS HSM for Canon lenses are attached to the camera with the OS function switched ON, the number of continuous frames per second decreases.

List of lenses requiring update for 40D camera

APO 120-400mm F4.5-5.6 DG OS HSM for Canon Serial Number lower than 1011001

APO 150-500mm F5-6.3 DG OS HSM for Canon Serial Number lower than 1007001

For further information go here:

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