Canon - RF 50mm f/1.2L USM vs Sony - FE 50mm f/1.4 GM
Where they actually differ
The most decisive specs, ranked by how much they matter — before the full spec table.
| Spec | Canon - RF 50mm f/1.2L USM | Sony - FE 50mm f/1.4 GM |
|---|---|---|
| Weight | 950 g | 516 g |
Between the RF 50mm f/1.2L USM and FE 50mm f/1.4 GM, the RF 50mm f/1.2L USM comes out ahead in several specs, while the FE 50mm f/1.4 GM wins on weight. Overall, the RF 50mm f/1.2L USM scores 65.4 and the FE 50mm f/1.4 GM scores 69.5 on our Mars Score.
Which should you buy?
The FE 50mm f/1.4 GM edges ahead on the Mars Score (65.4 vs 69.5), but the 4.1-point gap is small enough that the right pick comes down to which spec advantages matter to you.
The RF 50mm f/1.2L USM does not pull ahead on any single popular-comparison spec — its strengths sit in the spec-table groups rather than the headline advantages.
Pick the FE 50mm f/1.4 GM if you carry the device everywhere and weight or thickness has been the deciding factor before. Its strongest claims are weight. The single most decisive one: Weight — 434.00 g less. 516 vs 950.
Both ship with comparable min focal, max focal, weather sealed, so those specs do not separate the two — focus on the differences below.
Bottom line: there is no wrong answer here — match the spec advantages to how you actually use the product. The Mars Score parity says both are well-rounded; the differences are about trade-offs, not quality.
Which should you buy: Canon - RF 50mm f/1.2L USM or Sony - FE 50mm f/1.4 GM?
Sony - FE 50mm f/1.4 GM leads the current Mars Score by 4.1 points.The more useful decision is the trade-off behind that result: compare weight against the way you will actually use the product.
Choose Canon - RF 50mm f/1.2L USM if…
Canon - RF 50mm f/1.2L USM does not lead a decisive measured field here, so choose it for price, ecosystem, design, or availability when those matter more to you.
Choose Sony - FE 50mm f/1.4 GM if…
Sony - FE 50mm f/1.4 GM has the measurable edge on weight g.
This is a structured comparison of the published catalog values. It is not a claim of identical real-world performance across every workload; use the linked spec drill-downs and methodology page to inspect the inputs.
Why Canon - RF 50mm f/1.2L USM wins
- No decisive advantages.
Why Sony - FE 50mm f/1.4 GM wins
- ▲Weight — 434.00 g less. 516 vs 950.
Spec comparison
Optics
| Spec | Canon - RF 50mm f/1.2L USM | Sony - FE 50mm f/1.4 GM |
|---|---|---|
| Min focal | 50 mm | 50 mm |
| Max focal | 50 mm | 50 mm |
| Max aperture | f/1.2 | f/1.4 |
| Min aperture | f/16 | f/16 |
Build
| Spec | Canon - RF 50mm f/1.2L USM | Sony - FE 50mm f/1.4 GM |
|---|---|---|
| Weight | 950 g | 516 glead |
| Weather sealedⓘ | true | true |
| Optical stabilizationⓘ | false | false |
Mount
| Spec | Canon - RF 50mm f/1.2L USM | Sony - FE 50mm f/1.4 GM |
|---|---|---|
| Lens mount | Canon RFlead | Sony E |