a 50mm f1.8 fast prime lens with manual aperture ring adjustment showing the metal mount

isolated white backdrop background 50mm millimetre millimeter f 1 8 f1 8 fast prime lens lenses manual aperture ring rings adjustment adjustments showing metal mount weather seal sealed cpu old vintage nikon canon fujifilm sony pentax focus focusing motor vibration reduction value values nifty fifty nifty-fifty affordable cheap cheaper alternative alternatives dslr digital single reflex camera cameras accessory accessories hobby hobbies black plastic housing case