Light Lens Lab 50mm f/2 "Rigid"

The Light Lens Lab 50mm f/2 "Rigid" is a M-mount lens for Leica rangefinder cameras. Leica price index ↗

Reference maintained by Thomas Boots

Focal Length: 50mm

Aperture: 𝑓/2

Release Year (from): 2024

Diameter: 54 mm

Length: 44 mm

Minimum Focus Distance: 0.7m

Elements in Groups: 7/6

Aperture Blades: 10

Mount: M

Colors: Chrome

LightLensLab.com

Light Lens Lab 50mm f/2 "Rigid"

Light Lens Lab built its reputation by recreating revered and often unobtainable rangefinder lenses, and the 50mm f/2 "Rigid" extends that practice to one of Leica's most beloved standard lenses. It is a close reproduction of the second version of the Leica Summicron 50mm f/2 Rigid, the non-collapsing design Leitz introduced in the late 1950s, reproduced here as a brand-new M-mount lens for a fraction of the price commanded by clean original examples [1][2]. Unusually for the company, this is a homage to a lens that many Leica owners could realistically have bought used, at least in chrome, which set it apart from the firm's earlier projects that targeted genuinely rare optics [2].

The optical layout follows the classic seven-element, six-group arrangement of the original, paired with a ten-blade diaphragm and a brass barrel that gives the small lens a reassuring weight [1]. Reviewers note that the build is solid brass throughout, with a firm aperture ring and a smooth, long focus throw of close to 180 degrees, and that the handling, down to the infinity-lock tab on the focusing ring, closely mirrors the Leica original [1][2]. The lens is not rangefinder-coupled with six-bit coding, and Light Lens Lab made two practical departures from the vintage design: the minimum focus distance is shortened to 0.7 m from the original 1.0 m, and the aperture clicks in half stops rather than full stops [1]. Several testers found their copies well calibrated to the rangefinder out of the box, in contrast to aging originals that often need a technician's attention [3].

Light Lens Lab modernized the internals while keeping the look. The reproduction uses lanthanide-bearing glass described as "LaK-9" and updated coatings intended to be more durable than the fragile coatings of the vintage lens, along with fresh cement and new greases meant to keep performance stable for years [1][2]. The lens is offered in chrome and, according to its maker, in additional finishes including black paint and bare brass; the differences between it and the Leica are subtle, coming down to details such as fonts and screw design that most users would not notice without a side-by-side comparison [1].

Optical qualities

Rendering The lens is designed to reproduce the classic, slightly romantic drawing of the rigid Summicron rather than to chase modern MTF performance, and reviewers describe its overall look as faithful to the original [2][1].

Sharpness Center sharpness is reported as very good from f/2, though with some glow wide open, while edges and corners improve gradually and peak around f/5.6, behavior typical of the classic design [2]. One tester noted the corners can look slightly softer and glowier wide open than on the Leica original [1].

Contrast and color Wide-open contrast is described as a little lower than modern aspherical lenses, which is part of the intended vintage character, with ample micro-contrast returning once the lens is stopped down [2].

Bokeh and transitions Out-of-focus rendering is characterized as smooth but characterful, with a slight swirl and a touch of edge outlining in some conditions [2].

Flare resistance Flare control is rated as decent but short of modern lenses, with some veiling and ghosting when shooting into the sun [2].

Distortion and vignetting Distortion and chromatic aberration are reported to be well controlled, with vignetting present at f/2 and largely gone by f/4, where it is felt to add to the classic rendering [2].

Digital use On a 40-megapixel Leica M10-R, the lens was found to perform admirably and to render very close to the vintage Summicron [1].

History

Development and Launch Light Lens Lab announced the 50mm f/2 Rigid in December 2024, following the model of its earlier 35mm f/2 "eight-element" reproduction, with reviews and shipping copies appearing in early 2025 [1][3]. The company, based in China, specializes in recreating notable lenses from past decades rather than designing new highly corrected optics, and the Rigid sits among its growing line of classic 50mm homages [2].

Special editions The reproduction has been listed in several finishes, including chrome, black paint, bare brass, and a brassed black-paint variant, allowing buyers to approximate looks of the original Summicron that are otherwise very costly on the used market [1]. No separate factory military or export variants are widely documented.

Collector Notes The most common point of confusion is between this lens and the Light Lens Lab 50mm Rigid SP II, which is a different product reissuing the firm's Speed Panchro design in a rigid-style barrel rather than the Summicron formula [1]. The lens ships with a compact screw-on hood, and Light Lens Lab separately offers an IROOA-style hood for those who want the original Leica appearance; reviewers also report compatibility with genuine Leica clamp-on hoods such as the 12585 [1][2]. Metal front and rear caps are included. Two specification points are worth noting: the maker and reviewers cite weights and lengths close to but slightly different from the values recorded here, with one review giving figures around 43.5 mm long, 54 mm in diameter, 266 grams, and an E39 filter thread; LeicaLensList records a length of 44 mm and a 42 mm filter diameter, which should be taken as authoritative for this entry [1].