Patent: Canon RF 100-600mm f/8-11 IS STM optical formula
A new optical formula patent application from Canon has been approved in the form of a Canon RF 100-600mm f/8-11 IS STM. As we have Read more... The post Patent: Canon RF 100-600mm f/8-11 IS STM optical formula appeared first on Canon Rumors - Your best source for Canon rumors, leaks and gossip.