Fujifilm XF 100-400mm f/4.5-5.6 R LM OIS WR vs Sigma 100-400mm f/5-6.3 DG DN OS Contemporary

Both are Fujifilm X mount zooms for sports & action and telephoto — here's how the specs differ and which to pick. Every spec is from the manufacturer's own catalog.

Last verified 2026-09-01 · Fujifilm X mount · prices change — check the retailer

Spec	Fujifilm XF 100-400mm f/4.5-5.6 R LM OIS WR	Sigma 100-400mm f/5-6.3 DG DN OS Contemporary
Focal length	100-400mm	100-400mm
Max aperture	f/4.5-5.6	f/5-6.3
Type	zoom	zoom
Coverage	APS-C	APS-C
Mount	Fujifilm X	Fujifilm X

Which should you buy?

the Fujifilm XF 100-400mm f/4.5-5.6 R LM OIS WR opens wider (f/4.5-5.6) — brighter in low light and more background blur
the Fujifilm XF 100-400mm f/4.5-5.6 R LM OIS WR is first-party (Fujifilm) for guaranteed full autofocus and in-camera corrections; the Sigma 100-400mm f/5-6.3 DG DN OS Contemporary is third-party — usually the value pick

Where to buy

Fujifilm XF 100-400mm f/4.5-5.6 R LM OIS WR Lens - Black, Telephoto, Zoom, Weather-Sealed, Robust Construction, X-Mount

Fujifilm XF 100-400mm f/4.5-5.6 R LM OIS WRSee price on Amazon

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Sigma 100-400mm f/5-6.3 DG DN OS ContemporarySee price on Amazon

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FAQ

What's the difference between the Fujifilm XF 100-400mm f/4.5-5.6 R LM OIS WR and the Sigma 100-400mm f/5-6.3 DG DN OS Contemporary?
The Fujifilm XF 100-400mm f/4.5-5.6 R LM OIS WR is 100-400mm f/4.5-5.6 zoom, APS-C; the Sigma 100-400mm f/5-6.3 DG DN OS Contemporary is 100-400mm f/5-6.3 zoom, APS-C. Both fit the Fujifilm X mount.

Which is better in low light, the Fujifilm XF 100-400mm f/4.5-5.6 R LM OIS WR or the Sigma 100-400mm f/5-6.3 DG DN OS Contemporary?
The Fujifilm XF 100-400mm f/4.5-5.6 R LM OIS WR — its f/4.5-5.6 maximum aperture lets in more light and gives more background blur than the f/5-6.3 of the other.

Do the Fujifilm XF 100-400mm f/4.5-5.6 R LM OIS WR and Sigma 100-400mm f/5-6.3 DG DN OS Contemporary fit the same camera?
Yes — both are Fujifilm X mount lenses, so they fit Fujifilm X-T/X-H/X-Pro/X-E/X-S series (APS-C).

Citing these specs? Go ahead — manufacturer data, last verified 2026-09-01. Copy a ready-made reference:

More Fujifilm X comparisons: Fujifilm XF 16mm f/1.4 R WR vs Fujifilm XF 23mm f/1.4 R LM WR · Fujifilm XF 16mm f/1.4 R WR vs Fujifilm XF 35mm f/1.4 R · Fujifilm XF 150-600mm f/5.6-8 R LM OIS WR vs Fujifilm XF 50-140mm f/2.8 R LM OIS WR · Fujifilm XF 150-600mm f/5.6-8 R LM OIS WR vs Fujifilm XF 55-200mm f/3.5-4.8 R LM OIS · all Fujifilm X lenses · all comparisons

Fujifilm XF 100-400mm f/4.5-5.6 R LM OIS WRAffiliate linkSee price on Amazon