Canon has some truly fabulous lenses in their EF and RF mounts. From fish-eye to tilt shifts to super telephoto zooms, Canon’s lenses are built on character and incredibly reliable, even if they can ...

佳能在2021年推出了RF 400mm f/2.8L IS USM和RF 600mm f/4L IS USM，但它们在光学设计上与EF卡口相同。佳能等EOS R5、EOS R3等相机发布后，才把它们带到RF卡口上。

A check while keeping an eye on the focal length and maximum aperture, f/6.3 seemed to be active till 450mm when it became f/7.1 and then f/8 at just over 600mm. Canon RF 200-800mm F/6.3-9 IS USM ...