The Formula 5 28mm f2.8 Wide Angle Lens for Pentax K PK Manual Focus is a vintage lens from the 1970s designed specifically for Pentax, Konica, and Vivitar cameras. With a maximum aperture of f/2.8 and a focal length of 28mm, this manual focus lens is ideal for capturing wide-angle shots with stunning clarity. Made from high-quality aluminum and featuring a Japanese-made Konica Hexanon AR series, this lens offers compatibility with 28mm and 55mm filters, making it a versatile and reliable choice for photographers looking to expand their creative capabilities... This item is in great cosmetic condition and comes with the lens caps on both sides please see all photos for details...1B0430