The EF 85mm f: 1.8 USM has the advantage for head portraits, that it has a very, very slight pincushion distortion. An advantage because heads in turn act minimally narrower.
But you need not narrow it, with 85mm generations have photographed everything before the appearance of zoom. With a fixed focal length, one is forced to put a little more with the design apart. Because you can not just back, you have to move to the subject according to the viewfinder to have.
Unbeatable fixed focal lengths are in terms of light intensity, but not with any motif you can use this light intensity. In principle, fixed focal lengths at your maximum aperture weaker in terms of resolution, sharpness and chromatic aberrations. So you have to if you want absolute quality, Fade Out. And the lens is the lens aperture from 4 getting better and presents itself as one of the sharpest slight telephoto lenses at all. In low light situations, in contrast to the quiet open aperture of 1: 1.8 can be used as resolution, sharpness and chromatic aberrations, in such ambient light not so serious appear. As it already goes slightly to the telephoto side, it can also be very good at sports are used in small venues in which it arrives faster shutter speed to every tenth of a second.
From the technical side, it is almost L-class (Canon professional lenses = very expensive). The front lens rotates when unable to focus and also does not run (possible Polfiltereinsatz) from, but the lenses focus inward. A ring-type USM provides ultra-fast autofocus, you can intervene manually in the. Weight (0.42 kg) metal bayonet, eight aperture blades and a very good manufacturing make this the top lens.
In value for money, in my opinion, better than the 1.2 version. The Lens Hood ET-65 III must be purchased separately. If necessary, may be a quiver LH-B 12, and still is a ES-C13 leather bag rather quiver or a leather pouch LP1014 newer type are used.
For beautiful head portraits with blurred background to the person to indemnify the best lens.
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