The image file is compressed with winrar. The size is 8 gigabytes, so if you have a FAT32 formatted windows drive where you want to download the file that is not suitable, because it can only handle 4GB files. NTFS formatted drive is needed which is default in windows 7 & 10. I have plans to make a smaller image file, but that is not the top priority at the moment.
The device uses the default OS of the Raspberry Pi: Raspbian Stretch Lite (Linux). I’ve modified it a little and added some custom software for the bud photography.
Warning! This OS is not intended to use continuously connected to the Internet!
There are security issues so I don’t recommend to use it 0/24 online!!
(eg. The default password is not changed, the files are easy to modify, etc.)
Use Win32DiskImager or Etcher to write the image file to your SD card. At least you need a 8GB SD card. A larger one is also suitable, in order to use the space above 8 GB you have to expand the filesystem on your RPi device. Without expand you can only use 8GB. Anyway, 8 GB is also enough for thousands of photos 🙂
Here’s some more detailed info if you need some help on installing the OS: