Filter sizes for Canon RF lenses

Manufacturers have favourite filter sizes. Canon, for example, often adopted 72mm and 77mm for L-series EF mount lenses but that has changed somewhat with the RF mount to 67mm, 77mm and 82mm being common sizes. Once a popular size on the original Canon FD breach-lock mount lenses from the 70s (not FDn), the 55mm filter thread size is also making a comeback. For Canon lenses, I recommend Canon 'Protect' or Protector filters as they're extremely high quality. They're also very reasonably priced, at least for the popular sizes. Sizes above 82mm are steep, though, so you could look for more competitive offerings such as the excellent Firecrest models for that and larger, [affiliate links follow]: Canon UK Store Canon US Store Amazon UK (Canon Protect) | Amazon UK (Formatt Hitech - Firecrest)  Amazon US (Canon Protect)  | Amazon US (Formatt Hitech - Firecrest) As an Amazon Associate, I earn from qualifying purchases.   The following is a work in progress; the