This review has been gestating for a while. I’ll begin by providing some context. I’ve been using the Fujifilm XF 500mm f/5.6 R LM OIS lens since it was first released in 2024. It’s permanently attached to my Fujifilm XH2s. This lens is quite simply the best telephoto lens I’ve ever owned or used. The form factor and optics combine to produce the sharpest, lightest, toughest telephoto lens I’ve ever handled. The images it takes have a special quality. I therefore thought it would be interesting to compare it against my trusted but very old Canon 7D and EF 400mm f/5.6 L USM lens. This lens was released in 1993, and I’ve had mine since 2003. I can hear you all shouting that this is very unfair – well, we’ll see. It sounds a bit silly to compare a lens released 33 years ago with one released only a couple of years ago – but it’s interesting, nonetheless. They offer reasonably similar perspectives on the APS-C format (the Canon is a slightly smaller sensor drawing the focal lengths even closer).
We’ll look at how all the specs compare in a moment, before we look at how they actually perform in the field. However, I wanted to make this a three-way race because I’ve been increasingly frustrated with my other Fujifilm lens, the XF 150-600mm f/5.6-8 R LM OIS WR. This lens is fantastic when used at 600mm and wide open (f/8) to shoot small birds close-up in bright conditions. The results are sharp and beautifully rendered. However, I’m lucky to live in Australia where the light is generally very good year-round. Despite this, early or late shooting when the light fades are incredibly frustrating. The lens struggles to acquire focus in low light, and I’ve lost so many potentially great images because of this. After using this lens for 2 or 3 years, my frustrations have boiled over. It’s great in bright light, lets me fill the frame with small birds and generates gorgeous JPEGS, but after several long hikes and a lot of use it is at the threshold for comfortable handholding, and I find myself going to the 500mm Fuji lens more and more as it weighs less. The zoom also has a tendency to shut down and clunks and clicks in a very unreassuring way. I tell myself this is normal, but I’m not sure if it is. Still, it works but is certainly challenging to use at times.
The weight and low light issues with the zoom are compounded by the body I use. The XH2 is a great camera and the JPEG files generated are simply wonderful. However, when shooting bird action and flight in particular, rolling shutter is a serious problem as the XH2 does not have a stacked sensor like the XH2s. Birds in flight look like Icarus with wings melted out of shape. However, the largest and most fundamental issue that both the XH2 and XH2s have relates to their autofocus algorithms. I’ve soldiered on with both XH bodies and the 500mm and zoom lenses for a couple of years. I’ve got some nice action and BIF shots, but it is very hit and miss. I’ve tried tweaking every setting, but it doesn’t really change things. If I shoot up to 40fps, I may end up with one or two reasonably sharp images, but acquisition and tracking are not great. This is the elephant in the room and led me to sell off some old redundant gear to fund a swap to Nikons full frame Z8 and 600mm f/6.3 PF lens. This is the nearest equivalent to the Fuji XH2s and XF 500mm f/5.6 lens that I could find. Using this for a few weeks really shows up the Fuji bird focusing algorithms. The Nikon is very sticky and while I might get one or two sharp images in a high fps sequence or using pre-burst on the Fuji system, the Nikon will only give me one or two ‘out of focus’ images in a high fps sequence or when using pre-burst.
So, while Fuji is no longer my first choice for bird action or BIF, it is still great for ‘birds on a stick’/portraits, it’s still probably my favourite system overall due to small size, great glass and classic design. I just hope that when they announce the new XH3s using 6th gen technology, they do two things; 1. They have a fully stacked sensor and 2. They have autofocus algorithms that are at least as good as the Nikon Z8 at acquiring and tracking birds in flight. If so, they’ll have my business and I’ll buy an XH3s. If not, I’ll build up my Nikon equipment (Nikon has some of the best and the most diverse range of affordable lenses for wildlife shooting). The Z8 and 600mm are about the same weight as the XH2s and 500mm, so there is no weight penalty. I also get full frame and cleaner high ISO images. On the other hand, to my eyes, Fuji JPEGS are better than Nikon JPEGS, but I do find Nikon RAW files are easy to work with. Early Fuji RAW files had a lot of granularity (worms) when processed in certain software, I’m not sure where this issue stands now, but honestly, Fuji JPEGS are the best out there and I don’t feel I’m losing out by restricting myself to JPEGS. I can certainly see that Nikon RAW files are better quality than their JPEGS.
So having laid things out, it’s clear that by adding the Nikon Z8 and 600mm f/6.3 PF lens into the comparison, I’m inevitably going to have to deal with the elephant in the room – a system that focuses well and one that isn’t so good for small fast-moving subjects. Still, you might be surprised by the outcome.
We have a budget system that will necessitate a second-hand purchase (Canon 7D + 400mm f/5.6), a state-of-the-art system employing Phase Fresnel glass to keep weight down and sharpness up (Nikon Z8 + 600mm f/6.3) and my tried and tested Fuji XH2s + 500mm f/5.6.
Let’s start with some specs:
1. Fujifilm XF 500mm f/5.6 R LM OIS WR
- Length: ~256 mm
- Weight: 1,335 g
- Filter Size: 95 mm
- Close Focus Distance: 2.75 m
- Max Reproduction Ratio: 0.20×
- Image Stabilization: Yes, 5.5 stops
- AF Motor: Linear Motor (LM)
- Current Price (April 2026): ~$3,599.95 USD (B&H)
- Notes: Weather‑sealed, APS‑C lens (762mm FF‑equivalent)
2. Nikon Z 600mm f/6.3 VR S (PF)
- Length: 278 mm
- Weight: 1,390 g (without tripod collar) / 1,470 g (with collar)
- Filter Size: 95 mm
- Close Focus Distance: 4.0 m
- Max Reproduction Ratio: 0.15×
- Image Stabilization: Yes, 5.5 stops (6.0 stops with Synchro VR)
- AF Motor: Stepping Motor (STM)
- Current Price (April 2026): ~$4,696.95 USD (B&H)
- Notes: PF element for compact size; weather‑resistant
3. Canon EF 400mm f/5.6L USM
- Length: 257 mm
- Weight: 1,250 g
- Filter Size: 77 mm
- Close Focus Distance: 3.5 m
- Max Reproduction Ratio: 0.12×
- Image Stabilization: None
- AF Motor: Ring‑type USM
- Current Price (April 2026): Discontinued; used market typically $600–$1,000 USD
- Notes: Very lightweight for its era; built‑in hood
So how does this translate into field craft? The Fuji 500mm f/5.6 AF acquisition is respectable in good light for static or slow‑moving subjects, but is not in the same league as Nikon Z super‑teles or Canon RF/EF pro glass. As far as tracking/BIF are concerned, it struggles with fast, erratic subjects (small birds, crossing flight paths etc). Unfortunately, it tends to lose focus lock and starts to “hunt” once the subject leaves the AF box or if contrast/light drops. All in all, it can best be described as adequate for occasional flight shots, but definitely not a dedicated BIF tool.
As I said earlier, it’s true strength is for capturing perched birds, larger/slower wildlife, and distant static subjects where reach and sharpness matter more than tracking intelligence. I’ll add the caveat that like all telephoto lenses, heat haze will soften your images when shooting distant subjects on warm days, especially over rivers or lakes. Don’t mistake this for dodgy AF algorithms or bad optical glass.
The Canon EF 400mm f/5.6L has quite a fast AF, but is clearly aging tech outclassed by modern mirrorless‑optimized lenses. Its biggest issue is the lack of IS, a shorter reach than the Fuji, but wins for robustness and weight. It’s actually a pleasure to use.
The Nikon Z 600mm f/6.3 PF has class‑leading AF, outstanding balance and ergonomics, is light weight, has strong stabilisation, and is probably the most “effortless” field lens of the three.
While the XH2s has Fuji’s best AF to date (hopefully to be significantly improved in the XH3s [FULLY STACKED SENSOR PLEASE]), its AF tracking still lags behind Nikon Z and Canon’s DSLR pro bodies. The XF 500mm’s linear motors are fast for acquisition, but the system breaks down during continuous tracking. The combo of XH2s + 500mm lens is especially weak when a bird crosses a busy background or the subject shrinks or moves erratically. Additionally, if the AF box loses the subject for even a moment, once it loses lock, the lens tends to hunt, and reacquisition can be painfully slow. So, to summarise for this Fuji system – it is excellent for static subjects – simply unbelievably good. For slow flyers like large waders, results are acceptable. For fast birds in flight, it falls short.
Given this, the Canon 400mm becomes a more competitive option. I use the 7D+400mm lens with single spot autofocus (phase-detect) and it nails the image quickly and is usually successful in producing super sharp images (i.e. snaps to subjects quickly). Its limitation is no stabilisation, no bird subject tracking, and difficulty in low light given higher ISO noise in the older camera. However, on a bright day with lots of birds around it focuses reasonably fast and produces nice sharp images wide open at f/5.6. Second-hand this lens is a bargain. The Fuji XH2s + 500mm is a better combo for birding but costs a lot more. All in all, the Canon option would be a great purchase if you’re starting out in bird photography. Under good conditions, the images from the Canon are not far off the Fuji. You’ll have a better keeper rate with the Fuji, but it’ll be good enough given the low price point.
I suppose that the nitty gritty (what most people will be interested in) is how does the Fuji and Nikon compare? The Nikon Z8 + Z 600mm f/6.3 PF lens combo is the gold standard in my testing trio; it gives you: a) class‑leading subject detection, b) sticky tracking that stays locked even through branches, clutter, and erratic motion, c) fast, decisive AF acquisition. It also helps that the lens feels almost weightless for its given focal length.
This combo will give you the highest keeper rate, best tracking intelligence, and gives equally good balance and ergonomics as the Fuji combo. In fact, I would give this latter point to the Fuji. The tripod foot is larger and more substantive on the Fuji 500mm, and this makes it easier to carry and use handheld. In fact, I get a sense that the Fuji 500mm is probably the best built of the two lenses. I’m no engineer, but to me it just feels better made – time will tell! I’m splitting hairs here, but I also feel that the Fuji maybe optically slightly better – if so, it’s only by a whisker, and it’s fairly subjective. The truth is that both lenses are 11/10 in terms of sharpness.
So, to summarise:
In the field, the XF 500mm f/5.6 on the XH2s delivers fast initial AF acquisition, but continuous tracking is its Achilles heel. For birds‑in‑flight, the combo frequently loses lock and hunts, especially with small or erratic subjects. In contrast, my older Canon 7D with the EF 400mm f/5.6L actually locks on quite reliably thanks to its dedicated phase‑detect AF module and the lens’s fast ring‑USM motor. The Nikon Z8 paired with the 600mm PF lens is in another league entirely, offering sticky, intelligent tracking and the highest keeper rate by far.
I love Fuji, and I hope that the next XH3s iteration will make it the best birds in flight and action camera of them all – just make sure it’s a fully stacked sensor with Nikon level AF algorithms. If they do, Fuji fans the world over will be very happy bunnies.
Final Verdict:
After substantial side‑by‑side use, tens of thousands of frames, and real‑world fieldwork across three very different systems, the conclusion is clear: optics alone do not define a bird‑photography system — autofocus intelligence does. All three lenses in this comparison are capable of producing beautiful images, but the bodies driving them create fundamentally different shooting experiences.
The Fujifilm XH2s + XF 500mm f/5.6 is a fascinating paradox. Optically, it is nothing short of world‑class: sharp, lightweight, beautifully built, and capable of producing images with a signature look that is hard to replicate. For static subjects, perched birds, and slower wildlife, it is a joy to use and delivers results that rival anything on the market. But its Achilles heel remains the same: continuous autofocus tracking simply cannot keep pace with fast, erratic birds in flight, and no amount of menu‑tweaking can compensate for the underlying algorithmic limitations. It is a superb lens held back by a system that has not yet caught up to its potential.
The Canon 7D + EF 400mm f/5.6L is the surprise survivor. Despite its age, its dedicated phase‑detect AF module and fast ring‑USM motor still give it a reliability in focusing that belies its vintage. It lacks stabilisation, reach, and modern subject detection, but in good light it remains a remarkably capable tool — and on the second‑hand market, an extraordinary value. For beginners or budget‑conscious shooters, it remains a legitimate entry point into bird photography.
The Nikon Z8 + Z 600mm f/6.3 PF stands apart. It combines class‑leading subject detection, sticky tracking, decisive AF acquisition, excellent stabilisation, and a lens that feels impossibly light for its focal length. In demanding conditions — fast birds, cluttered backgrounds, unpredictable motion — it consistently delivers the highest keeper rate and the most confidence‑inspiring shooting experience. It is, quite simply, the most complete bird‑photography system of the three. The Z8 is an incredible tool – beautifully crafted and inherently flexible, albeit with a steep learning curve.
In the end, this comparison highlights the real “elephant in the room”: Fujifilm’s autofocus algorithms remain the limiting factor in an otherwise exceptional system. If the next‑generation X‑H3s brings a fully stacked sensor and AF performance on par with Nikon’s Z‑series, Fuji will have a truly world‑class wildlife platform. Until then, the Nikon Z8 + 600 PF is (for me) the benchmark for action and birds‑in‑flight, the Canon 400mm remains a charming and capable classic, and the Fuji 500mm continues to shine in every scenario except the one that matters most for fast wildlife.
