Imaging recource: Canon patent lays out optical formula for a 600mm f/4 DO IS lens

A new patent from Canon shows off the optical formula for a 600mm f/4 DO IS. Originally filed back in June of 2013, the patent displays yet another potential super telephoto lens from Canon that uses its proprietary Diffractive Optics technology. From the illustration, the lens appears to be made up of 19 elements in 10 groups, with one of the groups being the Diffractive Optics element and another being the internal focus element. Despite some initial concerns with Canon’s 400mm DO lens, Canon seems to have fixed most, if not all problems plaguing the...
(read more)

from Imaging Resource News Page http://ift.tt/1DCLzDC
via IFTTT