You feel like a voyeur looking through the hole in the wooden slice. Peep!
A slightly unsharp picture.
The dining-room of one of the nearby restaurants is observed (here: The Esstheater Sürig, Schwerte).
Slice of wood
Base of multiplex-wood
Miniature monitor of an eyepiece lens of an old camcorder
Video transmission path (dipatcher and receiver)
Observation camera