Understanding Lens Mounts: A Complete Guide for Beginners
Confused by lens mounts? We explain Canon RF vs EF, Nikon Z vs F, Sony E, and more to help you choose the right system.
A lens mount is the physical interface between your camera body and lens. Different manufacturers use different mounts, and even within the same brand, mounts change over time. Understanding lens mounts is crucial for buying compatible lenses and planning your camera system.
The Major Lens Mounts in 2026
There are five major lens mounts you need to know: Canon RF (mirrorless), Canon EF (DSLR), Nikon Z (mirrorless), Nikon F (DSLR), and Sony E/FE (mirrorless). Each has its own lens ecosystem, strengths, and limitations.
- Canon RF — Full-frame mirrorless, 54mm diameter, 20mm flange distance
- Canon EF — Full-frame DSLR, 54mm diameter, 44mm flange distance
- Nikon Z — Full-frame mirrorless, 55mm diameter (largest), 16mm flange
- Nikon F — Full-frame DSLR, 44mm diameter, 46.5mm flange distance
- Sony FE — Full-frame mirrorless, 46.1mm diameter, 18mm flange
Adapter Compatibility
One of the great things about modern mirrorless cameras is their ability to adapt lenses from other mounts. Since mirrorless cameras have shorter flange distances, you can use virtually any lens with the right adapter. This opens up access to vintage glass from Leica, Olympus OM, Pentax, and countless other systems.
The best camera system isn't the one with the most native lenses — it's the one that can adapt the most lenses from other systems.
— Lens adaptation enthusiast
Choosing Your First System
For beginners in 2026, we recommend starting with a mirrorless system — Canon RF, Nikon Z, or Sony FE. All three have excellent native lens lineups and the ability to adapt older lenses. Your choice should be based on which feels best in your hands and which lens ecosystem appeals most to your photography style.