Canon offer firmware update for EOS-1D Mark IV and RebelT2i
Canon EOS-1D Mark IV
Canon released the new firmware v1.0.8 for both EOS-1D Mark IV and RebelT2i to fix the problem of unexpected change of lens aperture while shooting movies at manual exposure mode using some Canon lenses including Macro lenses. It also fixes spelling errors in French and Spanish language menus of EOS-1D Mark IV.