Fujifilm Launches Fujinon MKX18-55mmT2.9 and Fujinon MKX50-135mmT2.9


FUJINON MKX18-55mmT2.9 and FUJINON MKX50-135mmT2.9

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Fujinon MKX 18-55mmT2.9: BHphoto, AmazonUS, Adorama
Fujinon MKX 50-135mmT2.9: BHphoto, AmazonUS, Adorama

New high-performance cinema lenses for mirrorless digital camera “X Series” Achieve stunning FUJINON cine lens performance with a lightweight body of approximately 1kg Equipped with focus and zoom mechanisms optimal for high quality video production

February 15, 2018

FUJIFILM Corporation (President: Kenji Sukeno) is delighted to announce that a new FUJINON MKX18-55mmT2.9 (MKX18-55mm) and FUJINON MKX50-135mmT2.9 (MKX50-135mm) will be added to the mirrorless digital camera “X Series” interchangeable lens lineup in June 2018. These lenses deliver high optical performance with the lightweight body of approximately 1kg and comfortable operability for professional video shooting. MKX18-55mm and MKX50-135mm are the first full manual cinema lenses to be compatible with the X Series interchangeable lenses. In the 35mm format equivalent, MKX18-55mm covers a focal distance from 27mm to 84mm and MKX50-135mm covers a focal distance from 76mm to 206mm. Combined with X Series’ unique color reproduction technology, MKX lenses further broaden the expression for professional video shooting.

The rapid growth in popularity of movie and video shared on the internet has increased the opportunity for shooting movies with a relatively small budget using digital cameras. With this in mind, Fujifilm released the “FUJIFILM X-T2” in 2016 which supports 4K video recording. To further support increased demands for video production, the “FUJIFILM X-H1” has been announced today, which features a range of new or upgraded video functions such as the new “ETERNA” mode for Film Simulation, ideal for shooting movies.
Increase in video production has created a demand among videographers and cinematographers for lenses optimized for shooting videos. Traditionally, cinema lenses which are required to meet the needs of videographers were typically large, heavy and expensive compared with photographic lenses. In February 2017, Fujifilm released MK lens for E-mount* cameras which have been praised for their ease of handling thanks to the compact and lightweight design. Despite their affordable price and lightweight design, the E-mount lenses offer the same optical performance and operability as other professional cinema lenses. The new MKX lenses keep the same design concepts featured on the E-mount MK lenses but are now compatible with Fujifilm’s X Mount cameras within the X Series. The new MKX lenses have an electrical contact which allows communication between lens and camera, which not only corrects the distortion** and the color/brightness shading, but also achieve various color expressions with Fujifilm’s Film Simulation modes.

“MKX18-55mm” and “MKX50-135mm” cover a focal length from 18mm to 135mm, which is the most frequently used focal length in video production and achieve a constant T2.9*** aperture across the entire zoom range, enabling a shallow depth of field as well as a beautiful bokeh effect. The lens designs are optimized for shooting videos as they minimize focus shift and optical axis shift while zooming, and reduce lens breathing-the change of angle of view during focusing. The lenses also feature three rings to enable manual and independent operation of focus, zoom and iris (aperture), all with the gear pitch*4 of 0.8M (module). The focus rings can rotate fully up to 200 degrees to facilitate precise focusing. These features make the lenses very comfortable and convenient to operate.

Fujifilm’s FUJINON cine lenses won the 69th Engineering Emmy® Award in 2017 and have been used at movie / CM / TV production sites around the world, thanks to their advanced scene-depicting capability. Tapping into its optical, high-precision processing and assembly technologies that have been nurtured over the years in the field of movie production, Fujifilm will introduce the “MKX lens” series to the current X Series interchangeable lens lineup to meet the diverse needs at the movie production frontlines.

  • * Lens mount format developed by SONY Corporation.
  • ** Phenomenon in which an image formed through a lens becomes partially contracted or extended at the edges.
  • *** T-stop value is an index that indicates brightness of a lens based on its F-stop value and transmission rate. The smaller the value, the greater amount of light the lens transmits.
  • *4 Distance between gear teeth

1. Main features of the MKX lenses:

(1) Advanced optical performance, packed into a compact and lightweight lens barrel

  • MKX18-55mm uses an optical construction comprising 22 glass elements in 17 groups, with six super ED lens elements and two ED lens elements. MKX50-135mm uses 22 glass elements in 17 groups, with two super ED lens elements and two ED lens elements. These lenses offer advanced edge-to-edge optical performance across the entire zoom range.
  • MKX18-55mm and MKX50-135mm have T2.9 aperture across the entire zoom range which facilitates the increasingly popular style of bokeh effect with shallow depth-of-field. This also cut out the need of lighting re-adjustment, contributing to saving shooting time.
  • The MKX lenses achieve advanced optical performance despite their compact and lightweight body by incorporating the benefits of short flange focal distance of X Mount into optical design to the maximum extent. Also, good operability at shooting site accommodates shooting with a limited number of people.
  • The electrical contact which allows communication between lens and camera not only corrects the distortion and the color/brightness shading, but also achieves various color expressions with Film Simulation modes.

(2) Optical and mechanical design optimal for shooting video

  • The front focusing group of lens elements and the zooming group of lens elements are driven independently from one another to suppress focus shift while zooming, which cut out the need of re-focusing after zooming in or out. The optical and mechanical approach allows no time lag as seen in an electrical control system.
  • The use of the front inner-focusing system controls lens breathing –the change of angle of view during focusing which achieves smooth focusing in an impressive scene.
  • Manufacturing technology developed for award-winning FUJINON cine lenses is applied to control optical axis shift while zooming, achieving intended composition every time.

(3) Comfortable operability provided through dedicated cinema lenses

  • The focus ring features a rotation of a full 200 degrees to facilitate precise focusing even when shooting with a shallow depth-of-field where a high degree of precision is required.
  • The lenses feature three fully manual rings to enable independent adjustment of focus, zoom and iris (aperture). This enables intuitive operations which cannot be attained with an electrical mechanism that typically causes time lag.
  • All the operation rings have a gear pitch of 0.8M, the same as all other FUJINON cine lenses, which allows the use of all standard third party accessories for video production such as Follow Focus that enable accurate and smooth focusing.
  • The iris supports seamless adjustment that is free of clicking. This enables precise and silent exposure adjustment while also preventing camera shake caused by the clicking.

(4) Standardized design for ease of operation

  • Since MKX18-55mm and MKX50-135mm adopt standardized design with the front diameter of 85mm and filter thread of 82mm, matte box and filer can be shared.
  • The gears for the three rings are positioned in the same place so as to cut out the need of re-positioning accessories when switching lenses.
  • The lenses have a macro function that allows shooting close-up to broaden the range of scenes that can be covered with one lens.
    MK18-55mm: Minimum Object Distance*5 of 0.38m (wide end)
    MK50-135mm: Minimum Object Distance of 0.85m (wide end)
  • The lenses feature a Flange Focal Distance adjustment function*6 to achieve optimum camera and lens matching, bringing out the lenses’ full optical performance.
  • *5 Distance from the image-forming plane to a subject
  • *6 The position of lenses’ image-forming plane can be adjusted according to each camera’s flange focal distance (distance from lens mounting reference plane to sensor)


2. Main features:

Type FUJINON MKX18-55mmT2.9 FUJINON MKX50-135mmT2.9
Lens construction 22 elements 17 groups (Includes 2 extra low dispersion elements and 6 super extra low dispersion elements) 22 elements 17 groups (Includes 2 extra low dispersion elements and 2 super extra low dispersion elements)
Focal length (35mm format equivalent) f=18-55mm(27-84mm) f=50-135mm(76-206mm)
Angle of view 76.5°-29.0° 31.7°-12.0°
T-No. T2.9 T2.9
Max. aperture F2.8 F2.8
Min. aperture F22-Close F22-Close
Aperture control Number of blades 9 (rounded diaphragm opening) 9 (rounded diaphragm opening)
Step size None None
Focus range 0.85m/2ft 9in-∞
[with wide macro function
0.38m/1ft 2.9in-(at wide end)]
1.2m/3ft 11in-∞
[ with wide macro function
0.85m/2ft 9in-(at wide end)]
External dimensions:
Maximum diameter x length (approx.)
(distance from camera lens mount flange)
φ87mm x 206.6mm φ87mm x 206.6mm
Weight (approx.)
(excluding caps, hoods, support foot, and tripod collar foot)
1,080g 1,080g
Front diameter 85mm 85mm
Filter size φ82mm φ82mm
Accessories included Tripod collar foot, Support foot,
Zoom lever, Lens cap, Lens rear cap,
Lens hood, Wrapping cloth
Tripod collar foot, Support foot,
Zoom lever, Lens cap, Lens rear cap,
Lens hood, Wrapping cloth

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