Canon - RF 24-70mm f/2.8L IS USM vs Sony - FE 135mm f/1.8 GM
Where they actually differ
The most decisive specs, ranked by how much they matter — before the full spec table.
| Spec | Canon - RF 24-70mm f/2.8L IS USM | Sony - FE 135mm f/1.8 GM |
|---|---|---|
| Weight | 900 g | 950 g |
| Optical stabilization | true | false |
| Min focal | 24 mm | 135 mm |
| Max focal | 70 mm | 135 mm |
Between the RF 24-70mm f/2.8L IS USM and FE 135mm f/1.8 GM, the RF 24-70mm f/2.8L IS USM comes out ahead in weight / optical stabilization, while the FE 135mm f/1.8 GM wins on min focal / max focal. Overall, the RF 24-70mm f/2.8L IS USM scores 64.6 and the FE 135mm f/1.8 GM scores 74.3 on our Mars Score.
Which should you buy?
The FE 135mm f/1.8 GM is the clear pick on raw spec strength, leading by 9.7 points on the Mars Score. The margin is wide enough that the underdog only makes sense if its individual strengths line up with what you specifically need.
Pick the RF 24-70mm f/2.8L IS USM if you carry the device everywhere and weight or thickness has been the deciding factor before. The biggest gaps in its favor are weight, optical stabilization. The single most decisive one: Weight — 50.00 g less. 900 vs 950.
Pick the FE 135mm f/1.8 GM if you care most about min focal / max focal. Its strongest claims are min focal, max focal. The single most decisive one: Min focal: 135 (vs 24).
Both ship with comparable weather sealed, so those specs do not separate the two — focus on the differences below.
Bottom line: the FE 135mm f/1.8 GM is the safer default. The other model is the right choice only when its specific advantages line up with your priorities.
Which should you buy: Canon - RF 24-70mm f/2.8L IS USM or Sony - FE 135mm f/1.8 GM?
Sony - FE 135mm f/1.8 GM leads the current Mars Score by 9.7 points.The more useful decision is the trade-off behind that result: compare min focal, max focal, weight against the way you will actually use the product.
Choose Canon - RF 24-70mm f/2.8L IS USM if…
Canon - RF 24-70mm f/2.8L IS USM has the measurable edge on weight g, has stabilization.
Choose Sony - FE 135mm f/1.8 GM if…
Sony - FE 135mm f/1.8 GM has the measurable edge on focal min mm, focal max mm.
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 24-70mm f/2.8L IS USM wins
- ▲Weight — 50.00 g less. 900 vs 950.
- ▲Has Optical stabilization.
Why Sony - FE 135mm f/1.8 GM wins
- ▲Min focal: 135 (vs 24).
- ▲Max focal: 135 (vs 70).
Spec comparison
Optics
| Spec | Canon - RF 24-70mm f/2.8L IS USM | Sony - FE 135mm f/1.8 GM |
|---|---|---|
| Min focal | 24 mm | 135 mmlead |
| Max focal | 70 mm | 135 mmlead |
| Max aperture | f/2.8 | f/1.8 |
| Min aperture | f/22 | f/22 |
Build
| Spec | Canon - RF 24-70mm f/2.8L IS USM | Sony - FE 135mm f/1.8 GM |
|---|---|---|
| Weight | 900 glead | 950 g |
| Weather sealedⓘ | true | true |
| Optical stabilizationⓘ | truelead | false |
Mount
| Spec | Canon - RF 24-70mm f/2.8L IS USM | Sony - FE 135mm f/1.8 GM |
|---|---|---|
| Lens mount | Canon RFlead | Sony E |