![Amazon.com : NK view Indoor 5MP Mini Cube Hidden Security IP Camera,ATM Camera,3.7mm Pinhole Lens, P2P,Free App View : Electronics Amazon.com : NK view Indoor 5MP Mini Cube Hidden Security IP Camera,ATM Camera,3.7mm Pinhole Lens, P2P,Free App View : Electronics](https://m.media-amazon.com/images/I/51Mm6ODELHL.jpg)
Amazon.com : NK view Indoor 5MP Mini Cube Hidden Security IP Camera,ATM Camera,3.7mm Pinhole Lens, P2P,Free App View : Electronics
![Megapixel M12X0.5 Board Lens Pinhole Camera Lens Optical Lens E. F. L. =2.1mm 1/4" Image Format for 1/4" Sensor Industrial Sport Security Camera Lens - China Lens and Optics Lens price Megapixel M12X0.5 Board Lens Pinhole Camera Lens Optical Lens E. F. L. =2.1mm 1/4" Image Format for 1/4" Sensor Industrial Sport Security Camera Lens - China Lens and Optics Lens price](https://image.made-in-china.com/2f0j00kdFaeBuMkWgs/Megapixel-M12X0-5-Board-Lens-Pinhole-Camera-Lens-Optical-Lens-E-F-L-2-1mm-1-4-Image-Format-for-1-4-Sensor-Industrial-Sport-Security-Camera-Lens.jpg)
Megapixel M12X0.5 Board Lens Pinhole Camera Lens Optical Lens E. F. L. =2.1mm 1/4" Image Format for 1/4" Sensor Industrial Sport Security Camera Lens - China Lens and Optics Lens price
![optics - Does 'focal length' mean something different with lenses and pinhole cameras? - Physics Stack Exchange optics - Does 'focal length' mean something different with lenses and pinhole cameras? - Physics Stack Exchange](https://i.imgur.com/Rmy2GPU.png)