You asked
Laowa aksen 17 5mm f 1 7 5 10x ultra macro apo vs laowa 15mm f 4 wide angle macro?
Both are manual-focus Laowa macro lenses for full-frame cameras, but they do different jobs.
The Laowa Aksen 17.5mm f/1.7 5-10X Ultra Macro APO is for extreme close-ups. It only works from 5x to 10x magnification, so it suits tiny subjects like insects or small details. It also has far more mount options, including Sony E, Nikon Z, Canon RF, L-Mount and Micro Four Thirds.
The Laowa 15mm f/4 Wide Angle Macro is an ultra-wide that focuses to 1:1. Pick it if you want a close subject with its surroundings in the frame. It fits fewer mounts: Sony E, Canon EF, Nikon F and Pentax K.
If you're new to focal length, the lenses guide explains how wide 15mm and 18mm feel.
Written by Claude from this site's pages.