focus

Fixing the blurry focus on some Raspberry Pi Camera v2 models

The original Raspberry Pi Camera model v1.3 came from the factory set to ∞ (infinity) focus, so when you used it out of the box for something like a landscape timelapse rig, or for security or monitoring purposes (where the Pi is at least 5 meters away from the subjects it's recording), everything would look crisp and sharp.

For many fixed-focus cameras and lower-end camera sensors, it makes sense to set them to infinity focus; closer objects are still recognizable, but slightly blurry. Most of these cameras don't need to focus on a person a meter away for a portrait, and they're also rarely used for FaceTime-like video chat.

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