If you’ve noticed your new Sigma lenses aren’t playing in a friendly way with your Canon 5D Mark IV, you aren’t alone. Canon has officially released an incompatibility warning informing users that a ...

Canon offers interchangeable lens cameras with different mounts and sensor sizes, so it can be tricky to pick the best lens for your SLR or mirrorless model. If you're not sure which lenses work with ...

It’s no secret Canon can be pretty difficult when it comes to allowing third-party lenses for RF mount cameras. Compared to other brands, very few exist and the ones that do don't feature autofocus.

The Canon RF 70-200mm f2.8L IS USM is small, sharp, and steady. It’s almost perfect, but the incompatibility with teleconverters will put off some photographers. Why you can trust Space.com Our expert ...