Waterproof Mini Camera
It's one of the lightweight GoPro-like cameras Public Labbers have been testing out -- one we tested survived a fall from 70 feet in its protective case -- though not recommended!
You can purchase the camera alone, or the camera with one of our DIY Filter Kits to convert for infrared use.
Read about our testing with one of these in this Atlas Obscura article!
These are listed at 12 megapixels (exact model will vary).
There is moderate lens distortion from these little cameras, but you can remove that with this free and open source online tool.