Rodenstock Grandagon-N 90mm f/4.5

Stand the Grandagon-N next to the Schneider Super-Angulon 90mm under a dark cloth and the first difference is not on the film, it is on the ground glass. At f/4.5 this Rodenstock throws one of the brightest 90mm view-camera images you can get, close to a stop past the Super-Angulon f/5.6 and worlds past the dim f/8. Focusing a wide on 4x5 means hunting for crisp edges in a corner that is already darkening toward the frame line, and that extra light is the whole reason people who shoot the Grandagon swear by it. The 72mm filter thread is the tell: this is the big-glass version of the line, not the compact f/6.8 that takes a 67mm filter.

The formula is the near-symmetrical wide-angle layout Rodenstock built the Grandagon around, and symmetry is why the distortion is low enough to shoot a building facade and leave the corners straight. Stopped to f/22, where you actually expose, it is sharp across the normal 4x5 frame with an image circle around 236mm. That covers up to 5x7, which on 4x5 leaves you roughly 48mm of shift before the corners give out, generous room for rise and a real swing of movement. The slower f/6.8 version draws a smaller 221mm circle, so the fast glass is the higher-coverage of the two 90mm Grandagons, not the other way around. Wide open the edges go soft and the field curves, which nobody cares about because f/4.5 is the focusing aperture and never the taking one. Contrast runs a hair warmer than the cooler Schneider rendering, and on chrome that warmth reads as a slightly friendlier sky.

The honest weakness is the one every extreme wide shares: corner falloff, and on this one it is real. A symmetrical 90mm darkens hard toward the edges, and on transparency film it shows as a heavy vignette you cannot ignore. Rodenstock sold a dedicated center filter for exactly this, and if you shoot color you need it, which buys you even illumination at the cost of about a stop and a half and a fair pile of money. For black and white the darkening reads as mood, so skip the filter and let it be.

Landscape and architecture shooters bought this through the 1990s, the ones loading 4x5 in a field camera on a ridge or a monorail inside a room they need to make look bigger than it is. It is not fast in any working sense and it is not a portrait lens. It is a precision wide that wants a tripod and patience. The cross-shop has always been the Schneider Super-Angulon and the Nikkor-SW. Against the f/5.6 Super-Angulon the Grandagon wins on finder brightness; against the equally-fast Nikkor-SW f/4.5 the finder is a wash, and the choice comes down to size, coverage, and rendering instead.

It sits in a Copal 0 leaf shutter, so flash sync works at every speed up to its 1/500 top, and every aperture lives in the lens rather than the body. Mind your metering at the small stops. By the time you rack the front standard out for a close foreground, bellows extension is stealing light a plain meter reading never sees. Zone Light Meter computes the bellows factor from the focal length and your measured extension, so meter the scene, dial in the draw, and let the app fold it in before you trip the shutter. Today a clean Grandagon-N trades cheap, partly because fewer people load sheet film at all. The glass earns it.