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Opal C1 — 4K Sony IMX378 · True-to-life color
Opal

Opal C1

4K Sony IMX378 · True-to-life color

87
/ 100
From $299
VS
Opal C1 wins by 2
Viofo A139 Pro (2K) — Security/dash cam · 2K
Viofo

Viofo A139 Pro (2K)

Security/dash cam · 2K

85
/ 100
From $400
Specdex verdict

Opal C1 takes it — here’s why.

In our weighted Specdex score, Opal C1 lands at 87 and Viofo A139 Pro (2K) at 85. That puts Opal C1 ahead by 2 points — a narrow margin driven mostly by its strengths in the categories below.

Pick Opal C1 if…

  • ✓Mirrorless-quality image
  • ✓Built-in mic array
  • ✓Solid software

Pick Viofo A139 Pro (2K) if…

  • ✓Weatherproof (most)
  • ✓Night vision
  • ✓Cloud + local storage options
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Winner by scenario

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

Build

Opal C1

Compared on the build sub-score

Opal C1 leads on build (90 vs 86).

Image

Opal C1

Compared on the image sub-score

Opal C1 leads on image (94 vs 81).

Features

Viofo A139 Pro (2K)

Compared on the features sub-score

Viofo A139 Pro (2K) leads on features (85 vs 82).

Value for money

Opal C1

Specdex score per dollar at MSRP

Opal C1 more score per dollar ($299 vs $400).

Opal C1 87
vs
85 Viofo A139 Pro (2K)

Score breakdown

Opal C1
87
image 94
features 82
build 90
value 78
Viofo A139 Pro (2K)
85
image 81
features 85
build 86
value 82

Specs side-by-side

Opal C1 versus Viofo A139 Pro (2K) — full spec comparison
Spec Opal C1 Viofo A139 Pro (2K)
Sensor
Sony IMX378 1/2.3″
—
Resolution
▲ 4K / 30 fps
2K
Connectivity
USB-C
—
Type
—
Security/dash cam
Release year
—
2022

Opal C1

Pros
  • +Mirrorless-quality image
  • +Built-in mic array
  • +Solid software
Cons
  • −macOS favoured, Windows lags
  • −Premium price
  • −Software required

Viofo A139 Pro (2K)

Pros
  • +Weatherproof (most)
  • +Night vision
  • +Cloud + local storage options
Cons
  • −Cloud storage subscription
  • −Wi-Fi dependency
  • −Privacy considerations

FAQ: Opal C1 vs Viofo A139 Pro (2K)

Which is better, Opal C1 or Viofo A139 Pro (2K)? +

Opal C1 scores 87 on our weighted rubric — ahead by 2. Your best pick depends on the sub-scores above.

Is Opal C1 worth the price? +

At $299, Opal C1 delivers a Specdex score of 87 — strongest in image.

Is Viofo A139 Pro (2K) worth the price? +

At $400, Viofo A139 Pro (2K) delivers a Specdex score of 85 — strongest in build.

Does Opal C1 or Viofo A139 Pro (2K) 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 build, Opal C1 or Viofo A139 Pro (2K)? +

Opal C1 — leads on build (90 vs 86). Compared on the build sub-score.

Which is better for image, Opal C1 or Viofo A139 Pro (2K)? +

Opal C1 — leads on image (94 vs 81). Compared on the image sub-score.