Has full-time manual focus. Canon EF 200mm F/2L IS USM. Canon EF 300mm F2.8L IS II USM. With full-time manual focus, you can move the focus ring whilst it is in AF (autofocus) mode. This means that you can make manual adjustments once the AF has finished, without changing to manual mode. Canon EF 16mm-35mm f/2.8 L II USM Zoom - ok at f/2.8, better at f/4.5 Canon EF-S 18mm-55mm f/3.5 - 5.6 IS Zoom - ok wide open at all focal lengths, better when stopped down one - two stops Canon EF 17mm-40mm f/4 L USM Zoom - ok at f/4, very good at f/5.6 The Canon EF 17-40mm f/4L USM lens is an inexpensive alternative to the 16-35mm f/2.8, but its edges are muddy at its widest angle. It isn't as sharp as the Canon EF 16-35mm f/2.8L II USM Canon EF. weather-sealed (splashproof) Canon EF 16-35mm F2.8L III USM. Tamron SP 15-30mm f/2.8 Di VC USD G2. The device is protected with extra seals to prevent failures caused by dust, raindrops, and water splashes. Has a metal mount. Canon EF 16-35mm F2.8L III USM. Tamron SP 15-30mm f/2.8 Di VC USD G2. .

canon ef 16 35mm f 2.8 l usm vs ii