Canon FD 55mm f/1.2 S.S.C.

Wide open at f/1.2, this lens glows. Spherical aberration leaves a soft halo around bright edges and a milky veil over the whole frame at maximum aperture, and the focus plane is paper thin. Some shooters chase that look on purpose. Others stop down to f/2 and watch it vanish. Neither approach is wrong, and the lens rewards both.

This is the chrome-nose S.S.C. version, Canon's Super Spectra Coating generation, made in the early FD breech-lock era of the 1970s and dated to roughly 1973. The 55mm focal length is a holdover from before the 50mm f/1.4 became the standard normal. It sits a hair longer than a true fifty, which actually helps for headshots since you back up slightly and the perspective on a face flatters more. The 58mm filter thread is shared across a lot of period Canon glass, so one set of filters covers a kit.

Stopped down to f/4 it sharpens up hard and the contrast snaps back, which surprises people who only ever shoot it open. Bokeh is the reason to own it. Out-of-focus highlights render as large soft discs with a faint bright rim, and backgrounds dissolve cleanly instead of breaking into busy edges. Field curvature is present, so the corners of a flat test chart fall off, but that is not what an f/1.2 normal is for. Flare is the real weakness. The coating is good for its day, but a strong backlight will wash a low-contrast haze across the frame and kick the odd green ghost. Shoot with a hood, or fold the flare into the picture.

Who reaches for it: available-light portrait shooters, video people who adapt FD glass to mirrorless bodies for that rounded vintage falloff, and anyone who wants subject separation a modern clinical fifty cannot give. It gets cross-shopped against the aspherical sibling, the FD 55mm f/1.2 S.S.C. Aspherical, which is sharper wide open and costs several times more, and against the contemporaneous Nikkor 55mm f/1.2. The S.S.C. is the value pick of that group. Heavy, all metal, with a long smooth focus throw that suits the thin depth of field.

One metering note. At f/1.2 in a dim room you are gathering light most lenses never see, and the temptation is to trust the lens and underexpose. Meter for the shadows you want to keep. In my experience the wide-open veiling glare lifts the low end a touch on its own, so I place a Zone Light Meter spot reading on Zone III, let the highlights bloom, and trust the shadows to hold. Spot the darkest thing you care about, expose for that, and shoot it open.