Two Guided Tests
Autofocus Speed & Minimum Focus Distance Test
A live sharpness score tracks your camera's focus in real time using the same edge-detection technique as our screen-share sharpness tool. Two tests run on top of it: how fast your autofocus recovers after something disrupts it, and how far your measured sharpness actually drops when you mark focus as lost while moving closer. No invented distance numbers — real measurements of what your camera is doing.
Live
Sharpness Score
Current: — (relative units — compare against itself over time, not against another camera's number)
Test 1
Autofocus Recovery Speed
Click Arm, then quickly move something across the frame or bring a new object into the foreground to disrupt focus. Timing starts the moment a drop is detected.
Start the camera first.
Result: —
Test 2
Minimum Focus Range Check
Click Start, then slowly bring a textured object — your hand, a business card, anything with visible detail — closer to the camera. Click "Focus Lost Here" the instant it visibly blurs.
Start the camera first.
Result: —
Notes
Why these two tests, and not a distance number
Camera-to-subject distance genuinely cannot be measured from a single 2D image without either a calibrated reference object or a second camera for stereo depth — neither of which a typical webcam test page has access to. Rather than fabricate a centimetre figure that would just be wrong, both tests here report what is actually, robustly measurable: elapsed time for the recovery test, and relative sharpness-score change for the sweep test. Both are real signals about your specific camera's behavior.
Reading your results
| Reading | Range | What it means |
|---|---|---|
| Fast recovery | < 500 ms | Near-instant — will not be noticeable on a call. |
| Moderate recovery | 500 ms – 1.5 s | Noticeable but tolerable, especially for casual calls. |
| Slow recovery | > 1.5 s | Visible blur/hunt period on every scene change. |
| Substantial sweep drop | < 40% of peak | A real, confirmed loss of focus. |
| Little to no sweep change | > 90% of peak | Possibly a fixed-focus lens, not an autofocus fault. |
Step-by-Step
How to Run Each Test
- Click "Start" and allow camera access when prompted.
- For recovery timing: click "Arm Recovery Test," then briefly wave a hand across the lens or change scene depth to disrupt focus, and let it re-lock.
- For the sweep test: click "Start Sweep," slowly bring a textured object closer to the camera, and click "Focus Lost Here" the instant it visibly blurs.
- Run each test two or three times for a representative reading rather than trusting a single result.
Common Questions