Sony - FE 135mm f/1.8 GM vs Sony - FE 50mm f/1.4 GM

The FE 135mm f/1.8 GM edges ahead on the Mars Score (74.3 vs 69.5), but the 4.8-point gap is small enough that the right pick comes down to which spec advantages matter to you.

Pick the FE 135mm f/1.8 GM if you care most about min focal / max focal. The biggest gaps in its favor are min focal, max focal. The single most decisive one: Min focal: 135 (vs 50).

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 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.