Canon RF 20mm f/1.4 L VCM vs Sigma 12mm 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.
| Spec | Canon RF 20mm f/1.4 L VCM | Sigma 12mm f/1.4 DC Contemporary |
|---|---|---|
| Focal length | 20mm | 12mm |
| 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 12mm f/1.4 DC Contemporary (12mm) 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 12mm 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 12mm 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
Sigma 12mm f/1.4 DC ContemporarySee price on Amazon
FAQ
What's the difference between the Canon RF 20mm f/1.4 L VCM and the Sigma 12mm f/1.4 DC Contemporary?
The Canon RF 20mm f/1.4 L VCM is 20mm f/1.4 prime, full-frame; the Sigma 12mm f/1.4 DC Contemporary is 12mm f/1.4 prime, APS-C. Both fit the Canon RF mount.
Do the Canon RF 20mm f/1.4 L VCM and Sigma 12mm 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 12mm f/1.4 DC Contemporary is APS-C-only and won't fill a full-frame sensor.
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