Evaluate imaging accessories by optical alignment, app dependence, sensor size, power and privacy—not marketing magnification.

Core ideas

  • Clip-on lenses can vignette or soften images if they are not centred over the active camera.
  • USB inspection cameras may require a UVC-compatible viewer and can expose sensitive spaces if their app uploads data.
  • Lights and gimbals improve consistency, but add heat, weight and charging requirements.

Decision rule

Choose an accessory only after checking which phone camera it aligns with and whether it works without a suspicious companion app.

Apply it on your phone

Capture a controlled reference scene before and after the accessory and compare edge detail, distortion and stability.

Official sources

22 · Phone Technology and Maintenance

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