Voigtländer Ultron 35mm f/2 I ASPH.

Voigtländer Ultron 35mm f/2 I ASPH.

Conceived as a deliberately vintage-styled member of Cosina's Voigtländer Vintage Line, the Ultron 35mm f/2 I ASPH. pairs a modern aspherical optical design with a slim, all-metal barrel and a small filigree focusing lever that recalls early Leica wide-angles [1]. Reviewers frequently note its visual kinship to the classic Leica look, and it is widely regarded as one of the most compact and budget-friendly modern alternatives to the 35mm f/2 Summicron ASPH, capable of clean, sharp results [2]. Introduced for the Leica M (VM) mount, it sits in the lineup as the moderate-aperture 35mm option below the faster Nokton 35mm family.

Voigtländer specifies an optical construction of eight elements in five groups, which according to user analysis includes a double-sided aspherical element and anomalous partial-dispersion glass to help control chromatic aberration. The lens is rangefinder coupled, focuses to a minimum of 0.58 m, and uses ten aperture blades; the all-metal housing keeps weight to about 170 g and accepts 39 mm filters. In practice, the rangefinder coupling tracks only down to roughly 0.7 m, with the remaining range to 0.58 m intended for zone or live-view focusing on mirrorless and digital bodies. The VM mount adapts readily to other systems, and Voigtländer offers close-focus VM adapters for Sony E, Fujifilm X, and Nikon Z cameras. Two optional hoods are listed, the round LH-4N and the rectangular LH-12, the latter giving slightly more shading thanks to its deeper construction.

The most important variation to understand is the split between Type I and Type II, which Voigtländer offers as two design variants rather than separate optical designs. The Type I keeps the classic appearance with the small focusing lever, while the Type II, released in March 2021, adopts a simpler, more intuitive focusing recess and is offered in black paint and silver finishes; the manufacturer states the optical formulas are identical and the principal difference is aesthetic and handling-related. The Type I is the lighter of the two at about 170 g, against roughly 210 g for the Type II.

Optical qualities

Rendering Documented impressions describe clean, sharp imaging with a generally classic character. Some users find the background rendering busy, while others compare its slightly swirly bokeh favorably to well-regarded Summicron 35mm designs and treat the effect as a means of subject separation.

Distortion and vignetting Vignetting is reported as noticeable wide open at f/2 and more pronounced than on some 35mm Summicron lenses, an effect some photographers use creatively for added depth.

Digital use On digital bodies, one reviewer notes optimal sharpness around f/5.6, with a visible drop in quality from diffraction by f/8 to f/11; the effect is described as less apparent on film.

History

Development and Launch The Ultron 35mm f/2 ASPH. for M mount was released in 2019 as part of Voigtländer's Vintage Line, a series emphasizing classic styling alongside contemporary optics.

Production Evolution In March 2021, Voigtländer introduced the Type II version with a revised, simpler barrel and a focusing recess in place of the lever, while maintaining the same optical design as the Type I. The two remain offered as parallel design variants rather than a straightforward replacement.

Collector Notes The Type I is identified by its small, filigree focusing lever and classic black finish, distinguishing it from the recess-focusing Type II. Some buyers have reported sticky focusing or occasional defective units, so checking focus action before purchase is advisable. The 39 mm filter thread matches several classic 35mm lenses, and the optional LH-4N and LH-12 hoods are accessories worth confirming as included when buying used.