Canon 600mm f/4 DO on the Way
Image: pophoto I don’t often post about rumours on my blog, but I’m too excited about this to let it pass, and it’s also not that much of a rumour since since Canon have already shown a working prototype of this lens… the EF 600mm f/4 DO IS. Canon have been working on diffractive optic technology for about 20 years, and it initially received a lukewarm reception when the first lenses were launched. The technology allows a lens to be physically much smaller and lighter than a regular lens, but it used to come at the slight cost of some …