You asked
Laowa 60mm f 2 8 2x ultra macro vs pentax hd da 40mm f 2 8 limited?
The Laowa and the Pentax are built for different jobs, so the choice mostly comes down to what you shoot.
The Laowa 60mm f/2.8 2X Ultra-Macro is the macro. It's a manual-focus lens that reaches 2:1 and still focuses to infinity, and it's made for full-frame bodies on Canon EF, Nikon F, Pentax K and Sony E. If close detail is the goal, this is the one.
The Pentax HD DA 40mm f/2.8 Limited is an autofocus pancake for APS-C Pentax K bodies. It frames like about 60mm on full frame and keeps the camera small, which makes it a good everyday walk-around prime. It isn't a macro lens.
If you're on Pentax APS-C and want macro, the Pentax HD DA 35mm f/2.8 Macro Limited is a 1:1 option in a small Limited barrel. Not sure which sensor you have? Check sensor sizes first.
Written by Claude from this site's pages.