The Raspberry Pi camera is designed to offer a fixed focus, but it is possible to have limited manual control over the camera focus if you’re very careful.
While the Raspberry Pi Foundation has their own guide on the process, we found George Wang’s video a very straightforward and less invasive way of doing it. Since you’re effectively breaking a glue seal, you will ultimately damage the plastic on the camera module, but as long as you’re gentle and avoid the lens itself the camera will be fine. Bear in mind that the camera module is stuck to the board with tape, so you’ll need to carefully hold it in place as you work the lens glue free.
Just remember – don’t over-turn the lens in either direction less you want it to thread or fall out completely!
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Stop breadboarding and soldering – start making immediately! Adafruit’s Circuit Playground is jam-packed with LEDs, sensors, buttons, alligator clip pads and more. Build projects with Circuit Playground in a few minutes with the drag-and-drop MakeCode programming site, learn computer science using the CS Discoveries class on code.org, jump into CircuitPython to learn Python and hardware together, or even use Arduino IDE. Circuit Playground Express is the newest and best Circuit Playground board, with support for MakeCode, CircuitPython, and Arduino. It has a powerful processor, 10 NeoPixels, mini speaker, InfraRed receive and transmit, two buttons, a switch, 14 alligator clip pads, and lots of sensors: capacitive touch, IR proximity, temperature, light, motion and sound. A whole wide world of electronics and coding is waiting for you, and it fits in the palm of your hand.