Why Canon's RF Mount Still Matters for Lens Design

Six years into the RF ecosystem, Canon's shorter 20mm flange distance is finally delivering on its original promise — the latest RF lenses are doing optical things that simply weren't possible in the EF era. For photographers invested in Canon glass, this is a useful reminder that the mount architecture gives Canon genuine room to innovate, not just repackage DSLR designs. It's a solid explainer piece if you're weighing RF glass against Sony FE or Nikon Z options and want to understand what the engineering differences actually mean in practice.