Head-to-head

Canon - RF 50mm f/1.2L USM vs Tamron - 28-75mm f/2.8 Di III VXD G2

Last updated Jul 24, 2026 · How Mars Score works

Probe A

Canon

RF 50mm f/1.2L USM

57.6/ 100D

Optics58· 55%

Build—· 35%

Mount—· 10%

Probe B

Tamron

28-75mm f/2.8 Di III VXD G2

57.1/ 100D

Optics57· 55%

Build—· 35%

Mount—· 10%

Quick verdict

Between the RF 50mm f/1.2L USM and 28-75mm f/2.8 Di III VXD G2, the RF 50mm f/1.2L USM comes out ahead in min focal, while the 28-75mm f/2.8 Di III VXD G2 wins on weight / max focal. Overall, the RF 50mm f/1.2L USM scores 57.6 and the 28-75mm f/2.8 Di III VXD G2 scores 57.1 on our Mars Score.

Buying advice

Which should you buy?

These two are nearly even on the Mars Score (57.6 vs 57.1). The decision is not about overall quality — both clear the bar — it is about which specific trade-offs fit your use.

Pick the RF 50mm f/1.2L USM if you care most about min focal. The biggest gaps in its favor are min focal.

Pick the 28-75mm f/2.8 Di III VXD G2 if you carry the device everywhere and weight or thickness has been the deciding factor before. Its strongest claims are weight, max focal.

Both ship with comparable weather sealed, optical stabilization, 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.

Why Canon - RF 50mm f/1.2L USM wins

▲Min focal: 50 (vs 28).

Why Tamron - 28-75mm f/2.8 Di III VXD G2 wins

▲Weight — 410.00 g less. 540 vs 950.
▲Max focal: 75 (vs 50).

Full readout

Spec comparison

Optics

Spec	Canon - RF 50mm f/1.2L USM	Tamron - 28-75mm f/2.8 Di III VXD G2
Min focal	50 mmlead	28 mm
Max focal	50 mm	75 mmlead
Max aperture	f/1.2	f/2.8
Min aperture	f/16	f/22

Build

Spec	Canon - RF 50mm f/1.2L USM	Tamron - 28-75mm f/2.8 Di III VXD G2
Weight	950 g	540 glead
Weather sealedⓘ	true	true
Optical stabilizationⓘ	false	false

Mount

Spec	Canon - RF 50mm f/1.2L USM	Tamron - 28-75mm f/2.8 Di III VXD G2
Lens mount	Canon RFlead	Sony E

Drill down

Spec-level deep dives

Min focal→Max focal→Max aperture→Min aperture→Weight→Weather sealed→Optical stabilization→Lens mount→

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