Fujifilm XF 18-135mm f/3.5-5.6 R LM Lens Review

Fujifilm XF 18-135mm f/3.5-5.6 R LM OIS WR Performance

At 18mm, sharpness is already excellent in the centre of the frame at maximum aperture and the clarity achieved towards the edges of the frame falls just short of good levels. Stopping down improves performance in the centre further, but the clarity towards the edges never really seems to catch up at this focal length.

Zooming to 55mm results in performance evening out across the frame. At maximum aperture, sharpness is very good in the centre and good towards the edges of the frame. Peak performance is realised between f/5.6 and f/8 at this focal length, where sharpness levels approach excellent levels across the frame.

Finally, at 135mm, sharpness in the centre of the frame is still high at maximum aperture, although performance towards the edges of the frame fall to fairly good levels. Stopping down to f/8 increases sharpness in the centre to outstanding levels and good levels towards the edges of the frame.

MTF@18mm

MTF@55mm

MTF@135mm

How to read our charts

The blue column represents readings from the centre of the picture frame at the various apertures and the green is from the edges. Averaging them out gives the red weighted column.

The scale on the left side is an indication of actual image resolution. The taller the column, the better the lens performance. Simple.

For this review, the lens was tested on a Fujifilm X-Pro1 using Imatest.

Chromatic aberrations are well controlled for a lens of this type, with fringing only just exceeding a pixel width at 135mm and f/5.6. This low level of CA shouldn't cause any issues, even in harsh crops from the edges of the frame, or in large reproductions.

CA@18mm

CA@55mm

CA@135mm

How to read our charts

Chromatic aberration is the lens' inability to focus on the sensor or film all colours of visible light at the same point. Severe chromatic aberration gives a noticeable fringing or a halo effect around sharp edges within the picture. It can be cured in software.

Apochromatic lenses have special lens elements (aspheric, extra-low dispersion etc) to minimize the problem, hence they usually cost more.

For this review, the lens was tested on a Fujifilm X-Pro1 using Imatest.

Falloff of illumination towards the edges of the frame is typical for a lens of this type. At 18mm the corners are 1.7 stops darker than the image centre at maximum aperture and at 135mm the corners are only 0.9 stops darker. Visually uniform illumination is achieved with the lens stopped down to f/8 or beyond throughout the zoom range.

Distortion is very well controlled for a lens with a high zoom ratio. Imatest was able to detect 1.56% barrel distortion at 18mm and 2.27% barrel at 135mm. Automatic correction of distortion in camera is very good, and this information can be read by many popular raw image converters, which should mean that distortion is rarely noticeable in practice.

With, or without, the petal-shaped hood attached, this lens is quite resistant to flare, coping well with shooting into the light, and with good control of flare.

Value For Money

This 18-135mm lens from Fuji costs around £750, which is quite expensive given alternatives available for other camera systems.

There are currently no comparable lenses available for Fuji X-series cameras as currently, Fujifilm have a monopoly on lenses for their own lens mount. The closest equivalent available for other camera systems is Sony's 18-105mm f/4 OSS lens, which sports a slightly shorter zoom range, and a constant f/4 maximum aperture and costs only £450.

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