Mamiya Mamiya-Sekor C 80mm f/2.8 N/L

Open a Mamiya 645 Pro kit and this is usually the lens already on the front. The 80mm f/2.8 was the normal lens most 645 kits shipped with, and on the 6x4.5 frame it sees about the way a 50mm does on 35mm. It is the workhorse focal length for the system, the one wedding and studio shooters kept threaded on the body and rarely swapped off.

What sets this version apart is the L: it is the leaf-shutter variant, with the shutter built into the lens barrel instead of relying on the body's focal-plane curtain. That buys you flash sync at every leaf speed instead of the 1/60 ceiling the body shutter imposes. Drag in some ambient with a slower speed, pop a strobe, and you freeze the subject clean against a darker room without a curtain banding your flash. If you are running this on the Zone Light Meter, set the shutter to the lens leaf range (1/30 to 1/500) and meter your ambient fill as usual; that full flash sync at every leaf speed is the whole reason to carry the L glass over the plain C version.

Optically it behaves like a competent normal lens rather than a character piece. Wide open at f/2.8 the center is sharp while the corners trail a little, with the shallow medium-format depth that makes the 80 read longer than its angle suggests. Stop down to f/5.6 or f/8 and the frame tightens up edge to edge, holding plenty of resolution for big enlargements. Contrast sits moderate, color comes out neutral, and the out-of-focus areas render smooth without any swirl or busy edges. Skin tones land naturally, which is precisely what the people shooting weddings and studio portraits were after.

The real catch is the leaf shutter itself: it is the slow, mechanical, repair-prone part of the lens. Blades gum up, sync drifts erratic, and a CLA on a leaf lens runs more than servicing a focal-plane body. A neglected copy will fire at the wrong speed and never tell you. Buy one that has been tested, or set aside money for a service before you trust it on a paid job.

Today it lives in the affordable medium-format bracket, cross-shopped against the standard 80mm f/2.8 C (cheaper, no leaf shutter) and against Hasselblad's pricier 80mm Planar if you want the V-system look. The pull toward the N/L comes down to full flash sync at every leaf speed on a 645 negative without paying Hasselblad money. For portrait and event work that mixes strobe with daylight, it earns its place in the bag.