Chinese optical manufacturer Zhong Yi Optics has announced availability of a new version of its Turbo adapter that allows full-frame Nikon lenses to be mounted on Fujifilm X series compact system cameras while retaining the intended field of view.

The Lens Turbo ll N/G-FX uses a lens construction that reduces the effective focal length of the mounted lens by 0.726x, which compensates for the crop factor encountered when full frame lenses are used in front of an APS-C sensor – such as those used in the Fujifilm X series bodies. The compensation doesn’t work out exactly though, as a 50mm lens will end up acting as a 55mm would (it's a net 1.09x crop). The focal length reduction also has the side-effect of increasing the maximum aperture of the lens by one stop.

Mitakon says that the new 4-element version of the Nikon adapter, which is also available for Canon and M42 lens uses, has improved optics which bring better resolution and aberration correction in the corners of the frame. The adapter is 32mm deep, has a diameter of 63mm and weighs 165g/5.82oz, and costs ¥21,000 plus tax/$150. For more information see the Mitakon website.

Manufacturer information

The Fuji X Camera Lens Turbo Adapter (Ver II) from Mitakon allows lenses to be mounted to APS-C format Fuji cameras, increasing the angle of view by 0.726x and the maximum aperture of the lens by 1 f-stop.

The four optical elements of the Lens Turbo adapter condense light from the full frame lens and project it onto the camera’s sensor allowing the sensor to capture all of the transmitted light, negating the crop factor and effectively producing full-frame coverage on non-full-frame sensors. A corresponding increase in the maximum aperture of 1 f-stop makes the lens more effective in low-light situations.

This adapter features 4 optical elements including one extra-low dispersion (ED) element which reduces aberrations for better delineated images. The adapter offers a sturdy metal construction and stainless steel mounts, it attaches to both camera and lens with little play and includes a front and rear protective cap. The Lens Turbo is a manual adapter offering no electronic communication between lens and camera. It is not compatible with Blackmagic cinema cameras.

* Allows lens to be mounted to Fuji X camera
* Increases the angle of view by 0.726
* Increases maximum aperture by 1 stop
* 4 lens elements in 4 groups including 1 extra-low dispersion element

This lens turbo adaptor may not fit all lenses due to different extensions at the lens rear mount. Lenses with extension more than 3mm are not recommended to use this lens turbo adaptor. Vignetting may occur if using APS-C lenses.