100mm · f/2.5
The Uran-27 100 mm f/2.5 is a heavy telephoto lens originally designed for aerial photography. It delivers sharp images at f/2.5 with very little chromatic aberration, though contrast is moderate and requires custom white balance due to a blue color shift (kds315). Bokeh is creamy and smooth. The lens is prone to flare, necessitating a long hood (kds315). It suits portrait and foggy environment photography, but its weight and flare sensitivity may challenge some users.