No! Generally, most manufacturers use their lens mounts. Therefore, when you are buying a DSLR, you are not just buying a camera but a whole system. The most common families of lens mounts for DSLR are the Nikon F-mount and the Canon EF lens mount. Both Nikon and Canon make broad families of lenses for their respective cameras. However, a few third-party brands like Sigma and Tamron, make lenses that are compatible with one another. In some cases, you can also use adapters. You can use them to mount a lens of one type on a different kind of camera.