Re. Laowa 65mm:...updated, to add a reasonably successful attempt to photograph the 4cm x 8cm schematic diagram which is attached to the battery compartment of my charity shop bought transistor radio.
a big file for me at 1400kB - I had photographed this previously, the improvement is significant, but I didn't note that set up
to be sure exactly what comparison to make.
Anyhow fairly happy with the manual focusing on a tripod.
Back to basic optics: an add-on lens, in GENERAL, is probably the worst way to go if you want good images. The makers of the add-on usually know nothing of the design of the base lens it will be used with so it can't be optimized for that lens. A one-size-fits-all approach must be taken. I have some add-on lenses for wide angle and tele-photo use and they do work, but they are not as good as a single lens of the same focal length.
Yes, a well designed macro lens, made for your camera, would be best. But they can be expensive. If you can use your lens on some kind of mechanical extension, even a simple extension tube, that, while not as good as a macro lens, may, in most cases be better than using an add-on lens.
And all macro lenses are not equal. They too can have their defects.
Don't any of the photographic magazines or web sites do "shoot-offs" anymore? There used to be comparison tests showing which lens was best. Or is modern gear just too expensive for anyone to buy ten lenses at $1000 each?