Macro Prime lenses for Samsung GX-20
The Samsung GX-20 incorporates the Pentax KAF2 mount & has a APS-C sensor. Currently, we have information on 3 Macro Prime lenses which will work with the GX-20.
The GX-20 has a crop factor of 1.5 so you will need to multiply the lens focal length with 1.5 to see it's full frame equivalence. You can simply click the 
image to visualize how the lens fits the GX-20.
We have additionally created an Advanced Lens Search so you are able to find your ideal lens.
ModelVisualizeFocal LengthApertureStabilizedWeight
Venus Laowa 100mm F2.8 2X Ultra Macro APO100mmf/2.8638g
Venus Laowa 25mm F2.8 2.5-5X Ultra Macro25mmf/2.8400g
Pentax 17 Pre-Orders Outperform Expectations by a Landslide
Samsung D-Xenon 100mm F2.8 macro100mmf/2.8 345g