Pentax 50mm F2 is the standard partnering lens with the Pentax K1000. An excellent all round performer for general photography. Optically clear condition. You can buy this lens for your K-mount or choose the option of adding a K&F precision PK-E adapter which enables this lens to be mounted on Sony E-mount, focus peaking cameras. Both lens caps. Both lens caps. Buy to use with your Pentax K mount or partner with a K&F high quality K - E adapter to use with your Sony full frame E-mount digital. .