Maker Chris Schaie has created this wonderful irising peephole for his workshop -- and yours too!
Chris says "It was created via a long discussion thread on brassgoggles (Due credit goes to Robo Von Bismark on said forum for the design inspiration) and a lot of trial and error." He's also working to "create a full sized door incorporating this design for [Bruce Rosenbaum's] upcoming 20,000 leagues exhibition in Foxboro."
It's available at Maker's Market for $385.
