7artisans 25mm F/1.8 Prime Wide-angle Lens. Manual Focus,Lens Construction: 7 elements in 5 groups.
Super lightweight. It's made of metal, even the lens Cap.
25mm F1.8 wide angle on an APS-C sensor, and at an equivalent 37.5mm focal length.
Maximum aperture of 1.8 delivers smooth bokeh, fit Close-up/portrait photo photography. It's close enough to the "normal" range of field of view to be useful in street photography, and its small size won't draw much attention.