Canon has issued an incompatibility warning informing users that Sigma Art lenses might not operate as intended on its DSLRs, including its new 5D Mark IV.
Olympus has unveiled a collection of brand new lenses for its M.Zuiko Pro lineup: the ED 25mm f/1.2 PRO, ED 12–100mm f/4.0 IS PRO, and ED 30mm f/3.5 Macro.
It would be easy to assume that there is some special technology at play in these $50,000 movie lenses, but that is actually pretty far from the truth.