Designed by Ping-Hsun ‘penk’ Chen and Ruha Cheng, the open source RUHAcam digital camera is powered by a Raspberry Pi Zero W computer connected to a Raspberry Pi High Quality Camera module, which boasts a 12.3MP Sony IMX477 sensor. Other features include a 2.2-inch TFT display that functions as a viewfinder, a 2,000mAg Li-Pi battery, and a 3D-printed case inspired by retro-style SLR cameras.
Yes, this is a fully-functional digital camera, and the image quality rivals that of modern smartphones when used with the right lens, or in this case, a 16mm lens ‘penk’ and Cheng attached to it for a few sample photos. The Github page has all the instructions you need to build your own or use it to make an even more advanced version. More information here.
