Tamron and Sigma offer firmware update service for Canon EOS 5DS/5DS R live view issues

Tamron and Sigma have both announced updates for their lenses to provide full compatibility with Canon's EOS 5DS and 5DS R models. Both firmware updates refer to behavior in live view shooting, something that has also caused problems in the Rebel T6s and T6i. This suggests that Canon's latest models feature a change in the way they drive lenses.