Suppress optical axis shift while zooming

Manufacturing technology developed for conventional FUJINON cine lenses is applied to control optical axis shift while zooming, achieving intended composition every time.

Standardized design for ease of operation

Only one matte box between the MKX lenses is needed with a 85mm front diameter. • Only one filter size between the MKX lenses is needed with a filter thread of 82mm. • The gears for the three rings are positioned in the same place so as to eliminate the need to re-position accessories when switching MKX 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*1 of 0.38m (wide end) • MK50-135mm: Minimum Object Distance of 0.85m (wide end) • The lenses feature a Flange Focal Distance adjustment function*2 to achieve optimum camera and lens matching, bringing out the lenses’ full optical performance.

Advanced optical performance

MKX18-55mmT2.9 uses an optical construction comprising 22 glass elements in 17 groups, with six super ED lens elements and two ED lens elements.

It has T2.9 aperture across the entire zoom range which facilitates the increasingly popular style of bokeh effect with shallow depth-of-field. This also eliminates the need to re-adjust lighting, contributing to shortening shooting time. The MKX lens achieves advanced optical performance despite its compact and lightweight body by incorporating the benefits of short flange focal distance of X Mount into optical design to the maximum extent. This accommodates shooting with a limited number of people. The electrical contact to communicate with the X Series camera not only corrects the distortion and the color/brightness shading, but also achieves various color expressions with Film Simulation modes.

Comfortable operability

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 lens features 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, e.g. 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.

Suppress lens breathing

The use of the front inner-focusing system controls lens breathing (change of angle of view during focusing which achieves smooth focusing in an impressive scene.

Optical and Mechanical Design

Suppress focus shift while zooming
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 eliminates the need to re-focus after zooming in or out. The optical and mechanical approach means there is no time lag as seen in an electrical control system.

Specs

Description

The MKX18-55mmT2.9 is a high-performance cinema lens for the X Series, offering professional-grade video quality and full manual control. Covering a 27–84mm equivalent range with a constant T2.9 aperture, it delivers shallow depth of field, smooth bokeh, and minimal focus shift, breathing, or optical axis shift—ensuring precise, reliable performance for serious filmmaking.

Specification
  • Model Number - MKX18-55mmT2.9
  • Release Date - June 21, 2018
  • Lens Configuration - 22 elements in 17 groups (2 ED lenses, 6 super ED lenses)
  • Focal Length - f = 18–55 mm (35mm equivalent: 27–84 mm)
  • Angle of View - 76.5° – 29.0°
  • T-Number - T2.9
  • Maximum Aperture Ratio (Open Aperture) - F2.8
  • Minimum Aperture - F22 – Close
  • Aperture Format - 9 blades (circular aperture)
    Step: No step
  • Shooting Distance Range - 0.85 m (2 ft 9 in) – ∞
    [0.38 m (1 ft 2.9 in) – ∞ at wide end during macro operation]
  • External Dimensions (Approx.) - φ87 mm × 206.6 mm (from tip to mount reference surface)
  • Mass (Approx.) - 1,080 g (excluding lens cap, hood, tripod mount, and support foot)
  • Front Frame Diameter - 85 mm
  • Filter Size - φ82 mm
  • In The Box - Tripod seat / Support foot / Zoom lever / Lens cap FLCP-82 / Lens rear cap RLCP-001 / Lens hood / Wrapping cloth

Included in the Box

  • Quick Start Guide

  • Lens

  • Lens hood

  • Lens Wrapping Cloth

FAQs

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Which Fujifilm camera is best suited for beginners or casual photographers?

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