I recently bought the Pinhole Pro "lens" from thingify purchased. Lens is in inverted commas because it is not a lens (which always consists of several optical lenses) but only looks like one.

For me, who have Pinhole camera-photography, some great features:

• the hole size is adjustable
• it has a filter thread, so the sensitive camera sensor can be protected from dust (through the hole) with a UV filter
• Stable mounting with lens mount
• Made of metal (aluminium)

A walk in the Weinviertel region provided an opportunity to try out the first one.