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The update addresses a bug in which the set aperture moves unexpectedly when shooting movies in manual exposure mode. This occurs when using certain Canon lenses (such as macro lenses).
At times the aperture of the lens may move unexpectedly along with the focusing ring (during focusing). Aperture values also change when operating the zoom ring of a zoom lens that has variable maximum aperture values; however, this is a normal operation because the camera controls aperture values properly depending on the focal length (or zoom position).
The firmware update also fixes the AF point-selection behavior of the C.Fn III-7 (Manual AF point-selection pattern) Custom Function when set to , in which it does not scroll through the available AF point selections. This might occur when rotating from the AF point in the lower left.
Additionally corrected is the AF point display for the viewfinder's electronic level when shooting in the vertical position, in which the viewfinder Electronic Level incorrectly displays the high side of the camera. This will undoubtedly be a great help to anyone who needs to level the horizon line in a photograph.
Laslty, the firmware update corrects misspellings in the Spanish and Thai menus for applicable products. A picture may be worth a thousand words, but it helps if they're spelled correctly.