Field test: X-Pro2 + XF 100-400mm F4.5-5.6 – Birdwatching in Tokyo

For my second visit to the bird sanctuary of the Kasai Rinkai park in Eastern Tokyo, I brought with me an X-Pro2with the XF 100-400mmF4.5-5.6 “super telephoto zoom lens” to put them to the test. Below is a summary of my thoughts on the newest and most expensive lens for X-mount cameras. All the sample images used in this post are straight-out-of-the-camera JPEGs (Velvia film simulation), without any additional processing. You can click on them for full size images.

The FUJINON XF100-400mmF4.5-5.6 R LM OIS WR is the long awaited super telephoto zoom lens for X-Series cameras. One of the reason behind the delay of the release of this lens, compared to its first appareance on the official Fuji roadmap, seems to have been a complete redesign of the lens somewhere along the development cycle. As a reminder, the first time I saw a prototype of the “super telephoto zoom lens”, as it was dubbed on the roadmap, it was supposed to be a XF140-400mm f4-5.6 lens, with a shorter size but a wider diameter (86mm). It looked like that (the lens on the right side):

The final design is slimmer but longer, and covers a longer focal range but is slightly slower when zoomed out. I cannot know for sure, but I would bet that the final design is probably lighter than the initial version too.

While the lens got longer, the tripod foot that comes with it became shorter, which seems like a odd decision to me, although arguably I am no lens engineer, as one would think that  a bigger tripod foot would offer a better stabilization once attached to a tripod head. If you don’t have any, Fujifilm sells a lens plate (MLP-75XF) that you can attach to the tripod foot to make it compatible with ARCA SWISS tripods. Personally, I also don’t see the point of having included the 100-140mm focal range compared to the initial design, as this part of the focal range is already covered by so many XF lenses.

Beyond those small reservations, there are mostly positive things to say in terms of design and handling. The smaller filter thread of the final version (77mm) will enable you to use common filters you might already own (I personally buy all my filters in the 77mm size, with a set of cheap step-up rings to use them on smaller lenses). The built quality feels good, with attention to details. There is a lock button to avoid any zoom creep, but the small feature that makes a big difference to me is the lens hood that clips on the lens. The last thing you want when you are on the side of a race track or a football field is for your lens hood to fall over every time you knock something or someone runs into you.

Coupled with the XF 1.4x teleconverter, the lens become a 140-560mm f8 equivalent lens. I shot the sample pictures in this post using an X-Pro2, with the XF 100-400mmF4.5-5.6 mounted on the 1.4x teleconverter, as I was trying to get as tight and as far as possible. All these shots were taken in very good lighting conditions (although between 6-9AM, so still in somewhat soft light), and in these ideal conditions the combo camera + teleconverter + lens was very responsive. The autofocus in particular did a perfect job on relatively still or slow moving subjects, despite of the addition of the teleconverter theoretically making it harder for the autofocus to work (it was much slower and hunted back and forth when I tested it indoor in poor lighting conditions, which is a totally normal thing). The autofocus struggled much more on flying birds, which was mainly due to my sheer inability to keep flying birds for an extended period of time in a tight composition when using such a long lens.

Here is what both extremes of the focal range look like when using the X-Pro2 + XF 100-400mmF4.5-5.6 + XF1.4x teleconverter:

Zoomed out:


Zoomed-in:

When shooting at 560mm with f8 maximum aperture, it can be difficult to obtain a shutter speed fast enough for handholding without raising the ISO setting higher than one might want to. This is when the image stabilisation of the lens kicks in. The image stabilisation of the XF 100-400mmF4.5-5.6 is to be commended for its effiency, in effect improving the quality of the images by allowing to use lower ISOs while still taking sharp pictures. The quality of the image stabilisation can also be seen in action in the video clips included in the video at the top of this post, inbetween still samples.

Additional samples gallery:

In conclusion, I really enjoyed my time with this lens. I usually don’t go birdwatching, so it gave me a good excuse to do so. With the addition of the XF100-400mmF4.5-5.6, X-mount lenses can now cover a huge focal length, and even more when you add the 1.4x teleconverter. It’s a great lens to handle with efficient image stabilisation for handholding and nice finishing touches such as the clipping hood with a small trap to adjust your filter if you are using a polariser. I personally don’t need to own such a long lens for 99% of what I shoot, but for the few times I would need it I will be absolutely confident to rent it – apart for indoor sports for which the faster XF50-140mmF2.8 will be a better option if you don’t want to focus manually.

3 thoughts on “Field test: X-Pro2 + XF 100-400mm F4.5-5.6 – Birdwatching in Tokyo

  1. Pingback: Field test: X-Pro2 + XF 100-400mm F4.5-5.6 &nda...

  2. Pingback: Fuji is the Leica of the New Millenium :: Mirrorless Telephoto Comparison :: X-Pro2 + Iridient = WOW… & more (miXed zone) | photoHANGOUT

  3. Pingback: Field test: X-Pro2 + XF 100-400mm F4.5-5.6 &nda...

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