Recently Richard broke down a patent application that showed an RF 70-150mm f/2L USM optical design, one that may would…
Browsing: RF 28-70 f/2.8L
Canon USA has restocked refurbished copies of the Canon RF 28-70mm f/2L USM and you can grab one for $2199…
Canon’s “look what we can do” zoom, the RF 28-70mm f/2L USM is about as highly regarded as any standard…
Canon has published a pretty interesting optical design patent for large aperture zoom lenses. The two designs in this patent…