Pentax Screw-K Mount Adapter Category_Lens Filters Included adapters allow you to

Included adapters allow you to use the Diana Flash on standard hotshoe cameras (like the LC-A+ and Fisheye 2) or use a hotshoe flash on Diana F+ body

just like photos from your local print shop

A rounded diaphragm opening

If it does not have this red ring

Pentax Screw-K Mount Adapter Category_Lens Filters Included adapters allow you toThis Pentax Lens Mount Adapter allows screw mount lenses to fit on modern K bayonet mount cameras. When used with this adapter, a screw mount (Universal Thread) lens will focus to infinity (cannot be used for automatic diaphragm or open aperture metering). When used on any Pentax automatic camera aperture priority camera automation is retained when using screw mount lenses and accessories.