Tamron and Sigma today announced that they have joined the Canon RF mount lineup, with Tamron being the first to launch the 11-20mm F2.8 with a large aperture ultra-wide-angle zoom lens in APS-C format, and Sigma soldering six of its previously popular APS-C lenses to the RF mount.
There are more and more users of the Canon EOS R system, but the Canon RF mount has always been relatively conservative, and consumers basically only have the original autofocus RF mount lens to choose from. Although the quality of Canon's RF mount lenses is very good, some third-party sub-lenses are more cost-effective in terms of price, and this time Canon has finally opened up the RF mount protocol, and everyone has more lens options. So, will you choose the original RF lens or the sub-factory?