A basic camera lucida, made with just 4m2 bolts, a piece of glass and mirror and a stand of your choice.
mirror: 1.5mm thick, 35*49.4mm
glass: 1.2mm thick, 49.4*49.4mm
Dimensions based off a set of slide glasses I had.
The “lamp convertor” part is specifically if you want to use an ikea flex arm lamp. Otherwise use the m6 bolt piece and just attach it to whatever you want.
Build video: