Voigtländer Ultron 75mm f/1.9 SC/MC

Voigtländer Ultron 75mm f/1.9 SC/MC

Announced by Cosina in early 2023, the Ultron 75mm f/1.9 is the fourth distinct 75mm rangefinder lens the company has built under the Voigtländer name, and notably each of the four carries a different maximum aperture [1][2]. Where the earlier VM 75mm f/1.5 Nokton chased outright speed, the Ultron trades a fraction of a stop for a smaller, lighter package and an unusually short minimum focus distance, making it the closest-focusing 75mm lens in the current M-mount range. It reaches roughly 1:4 reproduction at its 0.5 m close limit, which is well beyond what most rangefinder short teles allow.

The optical formula uses seven elements in five groups, three of which Cosina describes as partial-dispersion glass intended to control chromatic aberration while preserving resolution. The maker states that a moderate amount of spherical aberration was deliberately retained to balance sharp in-focus rendering against soft out-of-focus areas. The simple construction lets all elements move together during focusing, keeping the barrel to about 54 mm in length, compact for a lens of this focal length. Build is full metal, with a rangefinder-coupled helicoid that reviewers describe as smooth, a twelve-blade diaphragm, and a 49 mm filter thread. The focus ring is knurled rather than tabbed and travels around 120 degrees from 0.5 m to infinity; some reviewers note the throw can feel short for precise focusing wide open given how close the lens goes. A metal screw-in hood and matching metal cap are included as standard.

The lens is sold in two coating options that also differ in finish. The multi-coated (MC) version wears a matte black paint barrel for a modern look, while the single-coated (SC) version uses a black paint finish aimed at more classical tastes; the supplied hood and cap match each finish. Both are otherwise the same optical and mechanical design and share the same dimensions and mount. The lens lacks six-bit coding and, unlike some other current Voigtländer lenses, does not carry a red alignment dot for mounting.

Optical qualities

Rendering The Ultron renders in the smooth, modern manner typical of recent Voigtländer designs rather than in a vintage soft-glow style, with controlled aberrations and clean transitions from focus to defocus. Cosina's stated design goal of balancing resolution against a generous, soft bokeh by leaving some residual spherical aberration is borne out in independent testing.

Sharpness Testing on 24 MP and higher-resolution sensors found very good central sharpness at the apertures that matter, with peak performance reported in the f/2.4 to f/2.8 range and corners cleaning up further around f/4[3].

Bokeh and transitions Out-of-focus rendering is described as smooth and is helped considerably by the 0.5 m close-focus capability, which yields the highest magnification of any current Voigtländer M-mount lens at about 1:4.2. Some optical vignetting produces cat's-eye shaped highlights toward the frame edges wide open, though reviewers note it is less pronounced than on larger, heavier rivals.

Flare resistance On the multi-coated version, ghosting was rarely an issue in testing, but veiling flare can appear with the sun just outside the frame; the single-coated version is expected to behave differently.

Distortion and vignetting Distortion is low and consists mostly of uniform pincushion that corrects easily in software. Vignetting measures around 2.2 EV at f/1.9, improves to roughly 1.3 EV at f/2.8, and becomes negligible from about f/4.

Aberrations Lateral chromatic aberration is minimal and simple to remove in post; a slight focus shift on stopping down is the lens's main reported weakness.

Digital use The compact design also helps suppress edge issues on rangefinder sensors, and reviewers have used the lens successfully on Leica M digital bodies and, adapted, on mirrorless cameras including larger-format sensors.

History

Development and Launch Cosina announced the Ultron 75mm f/1.9 VM alongside other Voigtländer lenses in early 2023, with both coating versions priced identically at launch and expected to ship in the first part of that year. It joined a lineage of Voigtländer 75mm lenses that began with the 75mm f/2.5 Color-Heliar in 1999 and continued through the f/1.8 Heliar Classic and the f/1.5 Nokton, with the Ultron positioned as the smallest and closest-focusing of the group.

Special editions No major factory special editions or military, export, or converted variants of this lens are widely documented; the principal published variation is the choice between SC and MC coatings and their corresponding barrel finishes.

Collector Notes The clearest way to tell the two versions apart is finish: the MC uses matte black paint and the SC a glossier black paint, with hood and cap matching each. Because this is a current-production lens, originality and coating-haze concerns common to vintage glass are less of a factor, but buyers should confirm that the correct matching metal screw-in hood and cap are present and that the version (SC or MC) matches what is advertised. Prospective users who focus often at distance and wide open should be aware of the relatively short focus throw and the mild focus shift noted in testing.