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KIPON Ibelux 40mm f/0.85

The Kipon 40mm f/0.85 Mark II is a 40mm f/0.85 lens designed for Sony E, Fujifilm X, Micro Four Thirds, Canon EF-M mount cameras. Check GearFocus for current availability, with buyer protection on every purchase.

KIPON Ibelux 40mm f/0.85

KIPON Ibelux 40mm f/0.85

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Lens Overview — Kipon 40mm f/0.85 Mark II

The KIPON Ibelux 40mm f/0.85 is a manual-focus prime lens built for APS-C format mirrorless cameras, and its headline specification is an extraordinary maximum aperture of f/0.85. That figure places it among the fastest lenses available for mirrorless systems, opening up shooting possibilities in challenging light and giving photographers very precise control over depth of field. The lens covers the APS-C format and is available in four mounts: Sony E, Fujifilm X, Micro Four Thirds, and Canon EF-M, making it accessible across a wide range of popular mirrorless camera systems.

At 40mm it sits comfortably in standard prime territory on APS-C sensors. Focus is entirely manual, which is in keeping with a lens designed around such an extreme aperture where precise focus placement is essential. The filter thread measures 67mm, a useful detail for photographers planning to use ND or polarizing filters.

Weighing in at 1150g, this is a substantial piece of glass — the mass is a natural consequence of the optical work required to achieve an f/0.85 aperture. Image stabilization is not present, so shooters will need to account for that when handholding.

Key Features — Kipon 40mm f/0.85 Mark II

f/0.85 Maximum Aperture: One of the fastest apertures available on any mirrorless lens, enabling handheld shooting in extremely low light and razor-thin depth of field control.

40mm APS-C Prime: Delivers a natural, close-to-human-eye field of view on APS-C sensors, making it well-suited for street, portrait, and documentary shooting.

Four-Mount Availability: Available in Sony E, Fujifilm X, Micro Four Thirds, and Canon EF-M mounts, covering the majority of popular APS-C mirrorless systems.

Manual Focus Design: Fully manual focus operation gives the photographer precise control over focus placement, which is critical when working at such an extreme aperture.

67mm Filter Thread: Standard 67mm front thread allows straightforward use of ND, polarizing, or other common filters.

APS-C Format Coverage: Optical design is matched to APS-C sensors, ensuring full coverage across the target camera systems without vignetting.

Lens Specifications — Kipon 40mm f/0.85 Mark II

Kipon 40mm f/0.85 Mark II full specifications
SpecDetail
Use CasesFashion, Studio
Lens TypePrime
FormatAPS-C
Zoom/PrimePrime
Focal Length40mm
Maximum Aperturef/0.85
Camera SystemMirrorless
Lens MountSony E, Fujifilm X, Micro Four Thirds, Canon EF-M
AutofocusNo
Focus TypeManual
Image StabilizationNone
Filter Thread67mm

Description — Kipon 40mm f/0.85 Mark II

The KIPON Ibelux 40mm f/0.85 is a manual-focus prime lens engineered around an extraordinary f/0.85 maximum aperture, making it one of the fastest options available for mirrorless camera systems. Designed specifically for the APS-C format, it is offered in four mounts: Sony E, Fujifilm X, Micro Four Thirds, and Canon EF-M, giving a broad range of mirrorless shooters access to its capabilities. The 40mm focal length sits in standard prime territory on APS-C sensors, well-suited for documentary, portrait, and available-light work where maximum light transmission and selective focus are priorities.

The 67mm filter thread accommodates widely available filter accessories, and the lens weighs 1150g — a substantial but expected figure given the optical demands of an f/0.85 design. There is no image stabilization and no autofocus, placing full creative and technical responsibility on the photographer, which is precisely the kind of deliberate, hands-on shooting experience this lens is built for.

Pros — Kipon 40mm f/0.85 Mark II

  • ✓Exceptional f/0.85 maximum aperture offers extreme light-gathering capability
  • ✓Available in four mounts — Sony E, Fujifilm X, Micro Four Thirds, and Canon EF-M — covering a broad range of mirrorless systems
  • ✓40mm focal length on APS-C provides a natural standard prime field of view

Cons — Kipon 40mm f/0.85 Mark II

  • ✗Manual focus only — no autofocus support, which demands careful technique at such a wide aperture
  • ✗At 1150g, the lens is heavy for a mirrorless prime and may affect handling balance
  • ✗No image stabilization, meaning handholding at the edges of low-light performance relies entirely on shutter speed and technique

Videos — Kipon 40mm f/0.85 Mark II

Pink 40mm f/0.85 Lens BOKEH Machine! — Kai W

Resources & Downloads — Kipon 40mm f/0.85 Mark II

Manuals & Guides

Frequently Asked Questions — Kipon 40mm f/0.85 Mark II

Which camera mounts does the KIPON Ibelux 40mm f/0.85 support?+
The lens is available in Sony E, Fujifilm X, Micro Four Thirds, and Canon EF-M mounts. This covers a wide range of popular APS-C and Micro Four Thirds mirrorless camera systems. Be sure to select the correct mount version for your camera body when purchasing.
Does this lens have autofocus?+
No — the KIPON Ibelux 40mm f/0.85 is a manual-focus-only lens. Given the extremely wide f/0.85 maximum aperture and the razor-thin depth of field it can produce, precise manual focus control is an important part of using this lens effectively.
What filter size does the Ibelux 40mm use?+
The lens has a 67mm filter thread. This is a common filter diameter, making it straightforward to source ND filters, circular polarizers, or other accessories from most filter manufacturers.
How heavy is this lens, and is that typical for an f/0.85 aperture?+
The Ibelux 40mm f/0.85 weighs 1150g. Achieving an f/0.85 maximum aperture requires substantial optical elements, so the weight is a direct consequence of the lens design. Prospective buyers should consider how this weight interacts with their mirrorless camera body in terms of handling and balance.
Does the lens have image stabilization?+
No, image stabilization is listed as None in the specifications. Photographers shooting handheld should factor this in when selecting shutter speeds, particularly since the wide aperture makes this lens attractive for low-light work where slower shutter speeds might otherwise be tempting.
Is this lens suitable for full-frame mirrorless cameras?+
The Ibelux 40mm f/0.85 is designed for APS-C format coverage. Using it on a full-frame body in the same mount family may result in vignetting or incomplete image circle coverage, as the lens is not specified for full-frame sensors.

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