Canon Ultrawide Lenses Compared (Full-Frame) Canon 20-35 USM, 20-35mm f/2.8 L, 17-40mm f/4 L and 16-35/2.8II. enlarge. Canon 20-35 USM, 20-35 L, 17-35mm, 17-40mm and 16-35mm L II. enlarge. Canon 20/2.8 USM, 17-40/4 L, 16-35/2.8 L II and 16-35/4 L IS. bigger. Canon Ultrawide Lens Sharpness Comparison.
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. Lenses with a built-in focus motor can autofocus even if the camera does not have its own focus motor. Has full-time manual focus. Canon EF 35mm F1.4 II USM. Canon RF 35mm f/1.8 IS STM Macro. With full-time manual focus, you can move the focus ring whilst it is in AF (autofocus) mode. The Canon RF 15-35 mm f/2.8 L IS USM has a 9-bladed diaphragm and holds the same number of lens elements as the EF 16-35 mm f/2.8 L USM: 16. The lens elements have Canon’s SWC and Air Sphere Coating, and the front element has an extra treatment so that moisture and dirt don’t stick as well. The lens has a Nano-USM focusing motor. 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 Y8P6r.canon ef 16 35mm f 2.8 l usm vs ii
