I recently acquired a Carl Zeiss Jena Flektogon 35mm f/2.8 (Exakta mount) with a minimum focus distance of 0.18m. I tried it out as a macro-lens for photographing mushrooms. Here is an example of an Amethyst deciever (Laccaria amethystina). Z7 II with the Flektogon mounted via an adapter ring. Camera on tripod 1/5 s, f/22, ISO 1100.