JJC LH-46GF aluminum hood (sun visor, lens hood) 46mm - eg for Panasonic 20mm f / 1.7 or 4 mm f / 2.5 lens (Electronics)
Since the Panasonic 20 / 1.8 to contend with scattered light is recommended in any case, a lens hood. The product fits perfectly, can be screwed easily and be removed again, is lightweight and stable, thus protecting even the front lens of 20 / 1.7.