Patent: Optical Formula for an EF 800mm f/5.6L IS II

An updated EF 800mm f/5. 6L IS is a lens I figured we would have seen already, but here we are still waiting for an update. For the moment, owning an EF 600mm f/4L IS II and a 1. 4 teleconverter outperforms the EF 800mm f/5.

Patent: Lots of Big White Lens Patent Applications Surface

New patents for supertelephoto optical formulas have appeared at the USPTO. The range of formulas is quite vast, all the way from a new EF 300mm f/2.8L IS to a new EF 800mm f/5.6L IS design. We do think there will be some new “big white” lenses announced in the next 12 months, not including Read more...