Digital Photography Blog


Why is the XF50-140mm F2.8 lens so good?

Posted by Leigh Diprose

The Fuijnon XF50-140mm F2.8 R LM OIS WR (76mm to 213mm equivalent) is the ideal lens for portraiture. This focal length range is typically used by wedding and portrait photographers as it has the versatility to zoom in close to a subject without losing light. On the smaller end of the focal length, photographers are able to get in close to the action due to a minimum working distance of 1m. This allows for some excellent opportunities for close ups. Additionally having an aperture of F2.8 provides this lens with some of the nicest bokeh I've seen. The smooth out of focus results are due to the seven rounded aperture blades, which really do make your image 'pop'.



Photographers can be a keen bunch of explorers and I've seen them travel to varied locations to try and capture an illusive shot. Using the XF50-140mm you won't have to worry about your gear on these outdoor escapades as the lens features dust, water and low temperature resistance, a feature many photographers will find very comforting. The lightweight design of the lens is also a huge benefit to many photographers like wedding photographers who typically use this sort of lens for hours on end. Weighing only 995 grams the XF50-140mm is significantly lighter than the majority of its competitors, making it a welcome purchase for many a photographers kit. What I like about the lens as well is it maintains its small build due to an inner zooming mechanism that doesn't increase the len's size while zooming in an out.

Fujinon are renowned for their optics and I find this lens stands up to their heritage. Packed with three quiet linear motors and the world's top image stablization technology in its class, the excited photographer will have no trouble photographing subjects hand held in available light. Stabilization isn't one of the only things that makes this lens so good, lens like this one can be quite prone to optical anomalies like chromatic aberrations, lens flare and diffraction, so with this in mind Fujinon constructed this lens using 23 glass elements, which were assigned into 16 groups. Five of these lenses were ED elements and one a Super ED lens element (I'm still looking for the little red cape on it but can't quite find it). The end result of this planned construction is a maximum reduction of chromatic aberration allowing for an image that delivers an incredible sharpness. 

Fujifilm also coated the entire area of the lens surface with a High Transmittance Electron Beam Coating (HT-EBC) to reduce ghosting and flare, I know it sounds out of this world, but it's added to ensure the lens produces a sharp clear image. Further to this, the refractive index between the glass and air is altered by the use of a newly developed technology called Nano-Gradient Index (Nano-GI). The result is an effective reduction to the diagonal incident light, meaning there is a further reduction to ghosting and flare. Got it?

Now that you know all of this, you may be thinking, can this lens get any better?

Yes it can, here's the good part, when the XF50-140mm lens is attached to an X Series camera body like the X-T1 or X-E2, I recommend you turn on the Lens Modulation Optimizer (LMO) in the camera's menu as this will improve the lenses performance even further. Say what?  For those of you who would like to learn more I recommend you watch Fujifilm's National Digital Trainer Warrewyk Williams as he goes into what the LMO does in more detail in this video.


The XF50-140mm has an incredibly quiet high speed auto focus that's only possible due to a reduced weight of the focus lens and a engineered triple linear motor system that's precisely positioned. So if silence is your game, then this lens could be for you. If you're after a faster auto focus on the XF50-140mm lens you'll need a X-Series camera (like the X-T1) that offers Phase Detection AF. The advantage of Phase Detection AF is a extremely high-precision focus due to the auto focus reading a signal directly from the camera's sensor.