Stumbled onto this lens:
https://www.amazon.com/Opteka-15mm-LD-U ... B01MRELMGB
It looks like an exact clone of the Laowa 15mm f4 1:1 wide angle macro sans shift capability.
If it performs as well as the Laowa it's quite a bargain. Has anyone used this Opteka lens?
Have questions about the equipment used for macro- or micro- photography? Post those questions in this forum.