MS-Optics MS-Mode 50mm f/3.5 Apoqualia

The MS-Optics MS-Mode 50mm f/3.5 Apoqualia is a M-mount lens for Leica rangefinder cameras. Leica price index ↗

Reference maintained by Thomas Boots

Focal Length: 50mm

Aperture: 𝑓/3.5

Release Year (from): 2009

Diameter: 50 mm

Length: 38 mm

Minimum Focus Distance: 0.85m

Elements in Groups: 5/3

Aperture Blades: 12

Mount: M

Material Weight: Metal, 90g

Colors: Black

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MS-Optics MS-Mode 50mm f/3.5 Apoqualia

Hand-built in tiny numbers by the retired Japanese designer Sadayasu Miyazaki, this collapsible 50mm is one of the lenses that established the cult reputation of his MS-Optical R&D workshop. Miyazaki conceived it as an attempt to recreate the apochromatic look associated with classic Heliar-type optics, and the result is a five-element design arranged in three groups, with two cemented pairs that echo the Voigtländer Heliar layout [1][3]. It was the second lens Miyazaki released under the MS-Optics name, and its production run was very small, with sources citing only around 170 units made [3].

The lens uses a five-element, three-group formula in a retractable barrel, and Miyazaki specified lanthanum glass to help balance color correction across the concave elements [1]. Its true focal length is closer to 51.6mm, a common trait of these artisanal designs [1]. The aperture is a twelve-blade diaphragm sourced from a German maker, running from f/3.5 with no click stops, so f-stops are set by a smooth, continuous ring [1][2]. Handling is defined by a one-piece machined focus grip and a very short focus throw, which several users describe as fast and precise once the heavily greased helicoid loosens with use [2]. The lens weighs about 90g and takes a small filter thread, and it ships with a threaded screw-on hood that can be reversed over the barrel for transport [1][2]. LeicaLensList records this example as an M-mount lens that is not rangefinder coupled; it is worth noting that the lens is widely documented in screw mount (L39 / LTM), with reviewers mounting it on Leica M bodies by way of an M39-to-M adapter, and at least one survey flags the mount question explicitly [2][3].

Because each lens is essentially made to order, individual examples can vary, and buyers typically cannot choose a specific serial number [1]. The collapsing section is finished in black anodizing rather than the chrome seen on vintage Leitz collapsibles, which reviewers note makes it more discreet in use [2]. The lens is sometimes listed under slightly different names and transliterations, including MS-Optical and spellings such as Apoqualia or Apoqualia-AH, and at least one variant has been catalogued as a collapsible LTM model [2][3].

Optical qualities

Rendering Documented impressions of this lens come mainly from a small number of user reports rather than large test datasets. The recurring theme is strong central performance with classic small-aperture handling. Reviewers describe the center as very sharp with rich color contrast, and note color rendition that leans slightly cool [2].

Sharpness In the central field the lens is reported as extremely sharp, with noticeable softening of fine detail toward the corners and extreme edges [2].

Contrast and color User reports praise the color contrast and overall color rendition, with one calling the contrast effectively perfect for this lens and likening the output to that of an apochromatic design [2].

Bokeh and transitions At close focus the lens is described as drawing out-of-focus areas with a distinctive, swirling character attributed to field curvature and residual spherical effects, which some photographers use as an expressive element [2].

Distortion and vignetting Geometric distortion is reported as very low, described as almost perfect on a brick-wall test, and vignetting is said to be minimal [2].

Aberrations The main weakness noted in use is lateral chromatic aberration, which is more visible on digital sensors at high magnification and contributes to some loss of detail at the picture edges, along with a trace of coma toward the corners [2].

Digital use On a Leica M9 one reviewer found that selecting a 50mm f/2.8 lens profile worked well, and reported that rangefinder focus was accurate, although these comments concern the screw-mount example used with an adapter rather than a coupled M lens [2].

History

Development and Launch Sadayasu Miyazaki, a former designer of toy telescopes, founded MS-Optical R&D and built a reputation for compact, artisanal rangefinder lenses made largely by hand [2]. He released the collapsible Apoqualia 50mm f/3.5 in 2009, presenting it as a small, light alternative to vintage collapsible normals such as the Zeiss Tessar, Leitz Elmar and Voigtländer Heliar 50mm f/3.5 [1][2]. Miyazaki has explained that his aim was to recreate the apochromatic performance long associated with Heliar-type lenses, using lanthanum glass and a three-group structure to balance color across the elements [1].

Production Evolution This was the second lens in the MS-Optics lineup, and it is consistently described as a very limited release, with a commonly cited figure of about 170 units [3]. Reference surveys group it among Miyazaki's Heliar-inspired normals, distinct from his later 50mm designs such as the Sonnar-derived and Xenotar-derived models [3].

Special editions No widely documented factory special editions, military variants or major finish variations are recorded for this lens beyond its standard black collapsible form [1][2][3].

Collector Notes Buyers should be aware of the mount question: although LeicaLensList records this example in M mount, the lens is broadly documented in screw mount and is typically adapted to Leica M bodies, and it is not rangefinder coupled in the conventional factory sense, so coupling and focus accuracy should be confirmed on the intended body [2][3]. Reported figures vary slightly between sources, including filter-thread and weight measurements that differ from the values recorded here, which is common for small-batch handmade lenses; the verified specifications should be treated as authoritative [1][2][3]. Because the helicoid is heavily greased from new, infinity focus may feel stiff at first and ease with use [2]. The small threaded hood and screw-on front cap are easily lost, so confirm that original accessories are present, and check the exposed continuous aperture ring and the cemented element groups for haze or separation given the lens's age and hand-built construction [1][2].