I find lens construction quite satisfying. It’s the puzzle experimentation aspect of it that draws me in – how can I take these assorted bits and make something useful? Something that produces an image in focus, or achieves some sort of artistic result? What do I have at hand to make this happen? (so far: tape, cardboard, rubber bands, other lens barrel parts, some orthodontic wax, tacking putty, floral wire, and if all goes well it’s solidified with Sugru, stuff of the DIY gods.) So fun!