Canon RF 20mm f/1.4 L VCM vs Sigma 15mm f/1.4 DC Contemporary

Both are Canon RF mount primes for wide-angle and astrophotography — 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	Canon RF 20mm f/1.4 L VCM	Sigma 15mm f/1.4 DC Contemporary
Focal length	20mm	15mm
Max aperture	f/1.4	f/1.4
Type	prime	prime
Coverage	full-frame	APS-C
Mount	Canon RF	Canon RF

Which should you buy?

the Sigma 15mm f/1.4 DC Contemporary (15mm) is wider — more in the frame for street and interiors; the Canon RF 20mm f/1.4 L VCM (20mm) is tighter — more reach and compression for portraits
the Canon RF 20mm f/1.4 L VCM covers full-frame (also works on APS-C bodies); the Sigma 15mm f/1.4 DC Contemporary is APS-C-only — it won't fill a full-frame sensor
the Canon RF 20mm f/1.4 L VCM is first-party (Canon) for guaranteed full autofocus and in-camera corrections; the Sigma 15mm f/1.4 DC Contemporary is third-party — usually the value pick

Where to buy

Canon RF 20mm f/1.4 L VCMSee price on Amazon

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Sigma 15mm f/1.4 DC Contemporary Lens for Canon RF | Equipped with 13 elements in 11 groups, Its wide f 1.4 aperture all

Sigma 15mm f/1.4 DC ContemporarySee price on Amazon

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FAQ

What's the difference between the Canon RF 20mm f/1.4 L VCM and the Sigma 15mm f/1.4 DC Contemporary?
The Canon RF 20mm f/1.4 L VCM is 20mm f/1.4 prime, full-frame; the Sigma 15mm f/1.4 DC Contemporary is 15mm f/1.4 prime, APS-C. Both fit the Canon RF mount.

Do the Canon RF 20mm f/1.4 L VCM and Sigma 15mm f/1.4 DC Contemporary 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 15mm f/1.4 DC 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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Canon RF 20mm f/1.4 L VCMAffiliate linkSee price on Amazon