Fujifilm XF 100-400mm f/4.5-5.6 R LM OIS WR Specs & DoF

100–400 mm

Focal length

f/4.5–5.6

Maximum aperture

16°–4°

Diagonal angle of view (APS-C)

APS-C

Designed for

4.0×

Zoom ratio

Specifications#

Brand: Fujifilm
Model: XF 100-400mm f/4.5-5.6 R LM OIS WR
Lens type: Telephoto zoom
Focal length: 100–400 mm
Maximum aperture: f/4.5–5.6
Image circle: APS-C (23.5×15.6 mm)
Mount(s): Fujifilm X-mount
Projection: Rectilinear
Stabilisation: Yes (optical)
Autofocus motor: linear motor (LM)
Lensfun correction profile: Yes — distortion/vignetting/TCA

Equivalent focal length on different cameras#

Field of view and depth-of-field equivalence when this lens is used on bodies with different sensor sizes (natively or via an adapter).

Camera format	At 100 mm	At 200 mm	At 400 mm	Equiv. aperture (DoF)
APS-C	150 mm · 16°	300 mm · 8°	600 mm · 4°	f/6.8
APS-C (Canon)	160 mm · 15°	320 mm · 8°	640 mm · 4°	f/7.2
Micro Four Thirds	200 mm · 12°	400 mm · 6°	800 mm · 3°	f/9.0

Depth of field & background blur#

Computed on its native APS-C format (CoC 20 µm). “Blur @2 m” is the size of an out-of-focus point at infinity, as a percentage of frame width, with the subject at 2 m — a simple bokeh index. Full table: 105 mm f/5.6 on aps-c.

Focal	Aperture	at 1 m	at 2 m	at 5 m	at 10 m	Hyperfocal	Blur @2 m
100 mm	f/4.5	1.6 cm	6.7 cm	43.2 cm	1.76 m	114 m	5.0%
100 mm	f/8	2.8 cm	11.9 cm	77.1 cm	3.17 m	64.0 m	2.8%
200 mm	f/4.5	0.4 cm	1.6 cm	10.6 cm	43.1 cm	455 m	21.0%
200 mm	f/8	0.6 cm	2.8 cm	18.8 cm	76.8 cm	256 m	11.8%
400 mm	f/4.5	0.1 cm	0.4 cm	2.5 cm	10.6 cm	1.8 km	94.6%
400 mm	f/8	0.1 cm	0.6 cm	4.5 cm	18.8 cm	1.0 km	53.2%

Handheld & night-sky limits#

NPF assumes typical 20–24 MP sensors (≈6 µm pixels on full frame, ≈3.9 µm on APS-C, ≈3.3 µm on Micro Four Thirds).

Body	Min. handheld shutter (longest focal)	500 rule at 100 mm	NPF at 100 mm, f/4.5
APS-C	1/640 s	3 s	3 s
APS-C (Canon)	1/640 s	3 s	3 s
Micro Four Thirds	1/800 s	2 s	3 s

Compatible cameras#

Bodies in our database with a native Fujifilm X-mount mount. Full-frame bodies switch to an APS-C crop with this lens.

Adapt it to other systems#

Nikon Z Pentax Q

Similar lenses#

Fujifilm XF 100-400mm f/4.5-5.6 R LM OIS WR + 1.4× conv. f/4.5–5.6
Fujifilm XF 70-300mm f/4-5.6 R LM OIS WR f/4–5.6
Fujifilm XF 70-300mm f/4-5.6 R LM OIS WR + 1.4x f/4–5.6
Fujifilm XF 55-200mm f/3.5-4.8 R LM OIS f/3.5–4.8
Fujifilm XC 50-230mm f/4.5-6.7 OIS f/4.5–6.7
Fujifilm XC 50-230mm f/4.5-6.7 OIS II f/4.5–6.7
Fujifilm XF 50-140mm f/2.8 R LM OIS WR f/2.8

Frequently asked questions#

Is the Fujifilm XF 100-400mm f/4.5-5.6 R LM OIS WR full frame?

No — it is designed for APS-C sensors. On a full-frame body it vignettes or triggers crop mode.

What is the Fujifilm XF 100-400mm f/4.5-5.6 R LM OIS WR equivalent to on APS-C?

Its focal length is already the real value for APS-C: 100–400 mm frames like 153–614 mm on full frame.

What is the Fujifilm XF 100-400mm f/4.5-5.6 R LM OIS WR good for?

As a telephoto zoom it suits sport, wildlife, events and compressed landscapes.

Sources & licences#

Lensfun lens database — CC BY-SA 3.0