The zeiss 35mm f2 t biogon zm lens is the fastest lens in the biogon family with an aperture of f20 and 10 aperture blades for soft smooth bokeh a multi coated high quality lens it is a compact wide angle lens suitable for everything from portraits to events ideal for travelling due to its lightweight yet robust construction this lens is suitable for handheld photography in low lighting its incredibly sharp with little to no distortion and has smooth and precise focusing as a resul