You asked
Laowa 15mm f 4 5 0 5x wide angle macro vs laowa 15mm f 4 wide angle macro?
Both are manual-focus, unstabilised 15mm macro lenses for full frame, so the choice comes down to magnification, aperture and mount.
The Laowa 15mm f/4.5 0.5X Wide Angle Macro is the one to pick if you own a Nikon Z, Canon RF or L-Mount camera, since it fits those and the f/4 version doesn't. It also gives you more depth of field at the same framing.
The Laowa 15mm f/4 Wide Angle Macro is the one I'd choose for close-up work. It focuses to 1:1, and its wider f/4 aperture lets in a little more light, which helps at close range. It also fits Pentax K.
If you're on Sony E, Canon EF or Nikon F, you can choose on magnification and light alone.
Written by Claude from this site's pages.