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Sony FE 20mm f/1.8 G — Prime/Zoom
Sony

Sony FE 20mm f/1.8 G

Prime/Zoom

90
/ 100
From $898
VS
Sony FE 135mm f/1.8 GM wins by 5
Sony FE 135mm f/1.8 GM — Prime/Zoom
Sony

Sony FE 135mm f/1.8 GM

Prime/Zoom

95
/ 100
From $2,098
Specdex verdict

Sony FE 135mm f/1.8 GM takes it — here’s why.

In our weighted Specdex score, Sony FE 20mm f/1.8 G lands at 90 and Sony FE 135mm f/1.8 GM at 95. That puts Sony FE 135mm f/1.8 GM ahead by 5 points — a decisive margin driven mostly by its strengths in the categories below.

Pick Sony FE 20mm f/1.8 G if…

  • ✓Fast aperture
  • ✓Quiet autofocus
  • ✓Weather-sealed (most)

Pick Sony FE 135mm f/1.8 GM if…

  • ✓Fast autofocus
  • ✓Weather-sealed
  • ✓Premium optics
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Winner by scenario

Derived from the sub-score breakdown · not a separate test

Sharpness

Sony FE 135mm f/1.8 GM

Compared on the sharpness sub-score

Sony FE 135mm f/1.8 GM leads on sharpness (95 vs 90).

Autofocus

Sony FE 135mm f/1.8 GM

Compared on the autofocus sub-score

Sony FE 135mm f/1.8 GM leads on af (94 vs 88).

Build

Sony FE 135mm f/1.8 GM

Compared on the build sub-score

Sony FE 135mm f/1.8 GM leads on build (94 vs 88).

Value for money

Sony FE 20mm f/1.8 G

Specdex score per dollar at MSRP

Sony FE 20mm f/1.8 G more score per dollar ($898 vs $2,098).

Sony FE 20mm f/1.8 G 90
vs
95 Sony FE 135mm f/1.8 GM

Score breakdown

Sony FE 20mm f/1.8 G
90
sharpness 90
af 88
build 88
value 85
Sony FE 135mm f/1.8 GM
95
sharpness 95
af 94
build 94
value 84

Specs side-by-side

Sony FE 20mm f/1.8 G versus Sony FE 135mm f/1.8 GM — full spec comparison
Spec Sony FE 20mm f/1.8 G Sony FE 135mm f/1.8 GM

Sony FE 20mm f/1.8 G

Pros
  • +Fast aperture
  • +Quiet autofocus
  • +Weather-sealed (most)
Cons
  • −Mount-specific
  • −Weight varies
  • −Price scales with quality

Sony FE 135mm f/1.8 GM

Pros
  • +Fast autofocus
  • +Weather-sealed
  • +Premium optics
Cons
  • −Heavy
  • −Expensive
  • −Focus breathing varies

FAQ: Sony FE 20mm f/1.8 G vs Sony FE 135mm f/1.8 GM

Which is better, Sony FE 20mm f/1.8 G or Sony FE 135mm f/1.8 GM? +

Sony FE 135mm f/1.8 GM scores 95 on our weighted rubric — ahead by 5. Your best pick depends on the sub-scores above.

Is Sony FE 20mm f/1.8 G worth the price? +

At $898, Sony FE 20mm f/1.8 G delivers a Specdex score of 90 — strongest in sharpness.

Is Sony FE 135mm f/1.8 GM worth the price? +

At $2,098, Sony FE 135mm f/1.8 GM delivers a Specdex score of 95 — strongest in sharpness.

Does Sony FE 20mm f/1.8 G or Sony FE 135mm f/1.8 GM last longer? +

Based on our long-term update and support ratings, both ship with multi-year support. Battery and reliability scores are visible in the breakdown above.

Which is better for sharpness, Sony FE 20mm f/1.8 G or Sony FE 135mm f/1.8 GM? +

Sony FE 135mm f/1.8 GM — leads on sharpness (95 vs 90). Compared on the sharpness sub-score.

Which is better for autofocus, Sony FE 20mm f/1.8 G or Sony FE 135mm f/1.8 GM? +

Sony FE 135mm f/1.8 GM — leads on af (94 vs 88). Compared on the autofocus sub-score.