Friday, Jul 24, 2026 The claims desk. Receipts included. POWERED BY LENZ ↗
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The Claim

A smartphone camera autofocus system needs to achieve focus in under 100 milliseconds.

Verified by Lenz ·

The Short Version

The evidence does not support a universal under-100 ms autofocus requirement for smartphone cameras. Reliable sources show a wide range of autofocus and capture times, with many working devices operating above 100 ms while remaining commercially normal and usable. Sub-100 ms is better described as a fast, high-end target under favorable conditions than as a system-level necessity.

Caveats

  • Different metrics are often conflated: autofocus acquisition time, per-step focus time, and total shutter/capture lag are not the same measurement.
  • Manufacturer and marketing claims usually report best-case autofocus speeds under ideal lighting and subject conditions, not universal real-world performance.
  • The word 'needs' overstates the evidence; the data support 'can achieve' or 'is desirable for premium responsiveness,' not a hard requirement.

The Receipts

  1. Autofocus measurement for imaging devices

    DXOMARK

  2. Revisiting Autofocus for Smartphone Cameras

    ECVA

  3. Performance metrics for auto-focus in digital and cell-phone cameras

    IEEE

  4. What to do if my Galaxy phone camera does not focus on the subject?

    Samsung

  5. PDAF (Phase Detection Auto Focus) | Technology

    Sony Semiconductor Solutions

  6. [Video] Dual Pixel Pro: Improved Autofocus to Allow you to Capture Every Precious Moment

    Samsung Newsroom

  7. Benchmarking of Mobile Phone Cameras

    University of Vaasa

  8. How does focus work on mobile phone cameras?

    Photo Stack Exchange

  9. 5 phones with ultrafast camera focus

    YouTube

  10. How to Choose an Auto Focus Camera Mobile Phone (2025 Guide)

    Alibaba Electronics

+ 11 more sources — see the full list on Lenz

Filed Under

Smartphone Camera Autofocus Systems

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