Macro is one of those subjects that kind of has two extremes. Either you can go way over the top expensive, with decent macro lenses starting at quite a few hundred dollars or you can go super cheap, utilising tools such as extension tubes with your “normal” lenses. But there is a third alternative, a mix of inexpensive and DIY. And this project from Nick Sherlock takes that DIY route to a low budget extreme with some pretty amazing results.
He designed an adapter for Sony E and Canon EF mount cameras that can be easily 3D printed and allows him to connect an inexpensive $23 4x microscope objective and essentially use it as a macro photography setup. And while it’s no Laowa probe lens, the objective being so small also means you can poke it through things to get much closer to your subject without too much interference.