Sigma 10-18mm f/2.8 DC DN Contemporary vs Canon RF 15-30mm f/4.5-6.3 IS STM

Both are Canon RF mount zooms for wide-angle and landscape — here's how the specs differ and which to pick. Every spec is from the manufacturer's own catalog.

Last verified 2026-09-01 · Canon RF mount · prices change — check the retailer

Spec	Sigma 10-18mm f/2.8 DC DN Contemporary	Canon RF 15-30mm f/4.5-6.3 IS STM
Focal length	10-18mm	15-30mm
Max aperture	f/2.8	f/4.5-6.3
Type	zoom	zoom
Coverage	APS-C	full-frame
Mount	Canon RF	Canon RF

Which should you buy?

the Sigma 10-18mm f/2.8 DC DN Contemporary opens wider (f/2.8) — brighter in low light and more background blur
the Sigma 10-18mm f/2.8 DC DN Contemporary covers 10-18mm and the Canon RF 15-30mm f/4.5-6.3 IS STM covers 15-30mm — pick the range that matches what you shoot
the Canon RF 15-30mm f/4.5-6.3 IS STM covers full-frame (also works on APS-C bodies); the Sigma 10-18mm f/2.8 DC DN Contemporary is APS-C-only — it won't fill a full-frame sensor
the Canon RF 15-30mm f/4.5-6.3 IS STM is first-party (Canon) for guaranteed full autofocus and in-camera corrections; the Sigma 10-18mm f/2.8 DC DN Contemporary is third-party — usually the value pick

Where to buy

Check the Sigma 10-18mm f/2.8 DC DN Contemporary price on Amazon →

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Check the Canon RF 15-30mm f/4.5-6.3 IS STM price on Amazon → We could not find this one on Amazon US in Canon RF — this button runs an Amazon search for it rather than opening a product page.

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FAQ

What's the difference between the Sigma 10-18mm f/2.8 DC DN Contemporary and the Canon RF 15-30mm f/4.5-6.3 IS STM?
The Sigma 10-18mm f/2.8 DC DN Contemporary is 10-18mm f/2.8 zoom, APS-C; the Canon RF 15-30mm f/4.5-6.3 IS STM is 15-30mm f/4.5-6.3 zoom, full-frame. Both fit the Canon RF mount.

Which is better in low light, the Sigma 10-18mm f/2.8 DC DN Contemporary or the Canon RF 15-30mm f/4.5-6.3 IS STM?
The Sigma 10-18mm f/2.8 DC DN Contemporary — its f/2.8 maximum aperture lets in more light and gives more background blur than the f/4.5-6.3 of the other.

Do the Sigma 10-18mm f/2.8 DC DN Contemporary and Canon RF 15-30mm f/4.5-6.3 IS STM fit the same camera?
Yes — both are Canon RF mount lenses, so they fit Canon EOS R series (full-frame R5/R6/R8) and APS-C (R7/R10/R50). Note the Sigma 10-18mm f/2.8 DC DN Contemporary is APS-C-only and won't fill a full-frame sensor.

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

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