A couple of optical formula consumer zoom lens patents have appeared at the USPTO. Canon EF 17-70mm f/3.5-5.6 (US Patent Application 20180275370) Focal Length 17.40 Read more...
canonrumors.com2018-9-28 19:50
A couple of optical formula consumer zoom lens patents have appeared at the USPTO. Canon EF 17-70mm f/3.5-5.6 (US Patent Application 20180275370) Focal Length 17.40 Read more...
canonrumors.com