DJ-Optical 50mm f/1.0 Noctis Lux M

DJ-Optical 50mm f/1.0 Noctis Lux M

The DJ-Optical 50mm f/1.0 Noctis Lux M is a modern ultra-fast normal lens for Leica M-mount rangefinder cameras. Camera Obscura Elburg lists the lens as the “DJ-Optical 50mm f/1.0 Noctis Lux” in M-bayonet category and describes it as a boxed limited edition for the Chinese market, made to show what DJ-Optical could achieve with its own optical formula [1]. Other retail listings use the name “NyctaLux,” so both names should be captured as aliases.

The lens was launched in 2025 as a 50mm f/1.0 Leica M lens. Leica Rumors reported the launch date as September 9, 2025 and described the first version as a silver limited edition of 300 units, with a 62mm filter design allowing use of filter and hood together [2]. Phillip Reeve reviewed the Leica M version and listed 65mm diameter, 67mm length, 474g weight without hood, 62mm filter thread, 0.7m close focus and Leica M mount [3].

Specification handling requires care. Phillip Reeve lists the lens as 10 elements in 6 groups with 12 straight aperture blades, while Leica Rumors and some seller data list 10 elements in 5 groups with 11 aperture blades [4]. Because the public sources conflict, the database should use 10 elements, but keep groups and aperture blade count as Unknown unless confirmed from the exact production version or manufacturer documentation.

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Optical qualities

Rendering

The DJ-Optical 50mm f/1.0 is a fast character lens with strong shallow-depth-of-field rendering. Phillip Reeve describes the bokeh as distinctive in the M-mount world, with triangular out-of-focus highlights caused by coma, especially around f/1.0 and f/1.4. This makes the lens visually different from many other modern fast 50mm M lenses, but it should not be described as optically neutral.

Sharpness

Phillip Reeve reports good performance at portrait distances and high contrast in that use case, but weaker performance at close distances and strong focus shift. Notebookcheck, summarizing DJ-Optical’s own MTF information, describes the lens as only moderately sharp in the center wide open, with weak corner detail at f/1.0, making it better suited for portraits than flat-field work [5].

Contrast and color

The lens is reported to have surprisingly high contrast for a very fast M-mount lens. Leica Rumors states that DJ-Optical used an ultra-low-reflectivity coating process for glare control, while Phillip Reeve lists high contrast at portrait distances among the lens’s positive traits.

Bokeh and transitions

Bokeh is one of the main reasons to catalog the lens. Phillip Reeve compares its unusual out-of-focus rendering to the Canon EF 50mm f/1.0L USM and highlights its distinct look among super-fast M-mount lenses. The exact aperture blade count remains unresolved, so collector notes should avoid claiming either 11 or 12 blades unless confirmed from the exact copy.

Flare resistance

Flare resistance is a documented weakness. Phillip Reeve lists flare resistance as “not good,” even though the lens uses modern coatings. Buyers should not assume modern Leica or Voigtländer-level flare behavior.

Digital use

The lens is Leica M mount and rangefinder-coupled. Phillip Reeve notes significant rangefinder blockage, though not the worst among super-fast 50mm M lenses, and also reports strong focus shift. Calibration should be checked on the exact Leica M body because f/1.0 leaves little tolerance for focusing error.

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History

Development and Launch

DJ-Optical is an independent Chinese optical design team. Leica Rumors reported that the team had served the Chinese optical industry for more than 20 years and that the 50mm f/1.0 lens was launched for Leica M mount in September 2025. Phillip Reeve states that DJ-Optical had designed several earlier Chinese M-mount lenses and that this 50mm f/1.0 design had reportedly been pitched to TTArtisan before DJ-Optical decided to produce it under its own name.

Production Evolution

The first widely reported version was a silver limited edition, with Leica Rumors stating a production limit of 300 silver units. Later seller listings show a black version under the NyctaLux name and model number DJ-50F1M-B. Because these versions may differ in branding, finish or published specification data, silver Noctis Lux and black NyctaLux examples should be documented carefully by engraving, box label and seller data.

Special Editions/Variants

The silver limited edition is the main confirmed collector-relevant version. Camera Obscura Elburg describes its example as a special limited edition for the Chinese market, while Leica Rumors gives the silver production limit as 300 units. The black NyctaLux / DJ-50F1M-B version appears in later marketplace listings and should be treated as a related finish or market variant unless manufacturer documentation proves a separate optical revision.

Collector Notes

Collectors should verify the exact engraving, whether the lens or hood says Noctis Lux or NyctaLux, the serial number, finish, original box, hood, caps, rangefinder coupling and calibration. Phillip Reeve notes an odd naming split, with “Noctis Lux by DJ-OPtical” on the hood and “NyctaLux” on the retention ring. This makes naming especially important because seller listings may use either Noctis Lux or NyctaLux for the same lens family.

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Special editions

Known collector-relevant variants and related versions include:

• DJ-Optical 50mm f/1.0 Noctis Lux M, silver limited edition, reported as 300 units.
• DJ-Optical NyctaLux 50mm f/1.0 M, black version, model number DJ-50F1M-B.
• Boxed Chinese-market limited examples, collector-relevant when complete with hood, caps and packaging.
• Examples with mixed Noctis Lux / NyctaLux markings, should be documented by engraving and photos.
• Related DJ-Optical-designed lenses sold under other Chinese brands, historically relevant but separate entries unless branded DJ-Optical.

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Sources

• [1] Camera Obscura Elburg. DJ-Optical 50mm f/1.0 Noctis Lux. https://www.cameraobscuraelburg.nl/product/dj-optical-50mm-f-1-0-noctis-lux/
• [2] Leica Rumors. DJ-Optical launched a 50mm f/1.0 lens for Leica M mount. https://leicarumors.com/2025/10/01/dj-optical-launched-a-50mm-f-1-0-lens-for-leica-m-mount.aspx/
• [3] Phillip Reeve. Review: DJ-Optical 50mm 1.0 M. https://phillipreeve.net/blog/review-dj-optical-50mm-1-0-m/
• [4] eBay / Shotenkobo. DJOptical NyctaLux 50mm F1.0 Large Aperture Lens for Leica M. https://www.ebay.com/itm/297999062365
• [5] Notebookcheck. NyctaLux launches compact 50mm f/1.0 full-frame lens. https://www.notebookcheck.net/NyctaLux-launches-compact-50mm-f-1-0-full-frame-lens.1219892.0.html