Meike 50mm F1.8 Full Frame AF STM Lens Standard Aperture Auto Focus Fixed Prime Portrait Lenses for Panasonic Lumix Sigma Camera S1 S1R S1R II S9 S1H S5 S5 Mark II FP SL SL2 FPL T TL TL2 TL18

This lens would be ideal for those looking to upgrade from their older full frame camera or seek a unique, manual focus prime lens for artistic portrait photography on a premium camera system such as the Panasonic Lumix S1 series.