Vintage Sigma Zoom-K II 70-210mm f/4.5 Multi-Coated Manual Focus Telephoto Zoom Lens A classic, Japanese-made 1980s manual focus push-pull telephoto zoom lens configured for the Pentax K (PK) bayonet mount. This lens features a constant f/4.5 maximum aperture across the entire focal range, alongside a handy 1:5 Macro function for close-up detail shots. It is a fantastic native fit for classic Pentax film SLR camera bodies (such as the K1000, ME Super, MX, or Program A). It is also an excellent, budget-friendly choice for digital photography students or vintage glass enthusiasts looking to adapt analogue lenses onto modern digital mirrorless camera bodies (such as Sony E, Fujifilm X, or Micro Four Thirds). Comes complete with its iconic vintage hard-plastic storage case with blue caps, a protective front lens cap, a Pentax "P" marked rear cap, and a premium Jessop 52mm UV lens filter. Details Brand: Sigma Model: Zoom-K II Multi-Coated (MC) Lens Mount: Pentax K Mount (PK Bayonet) Focal Length: 70–210mm (Telephoto Zoom) Maximum Aperture: Constant f/4.5 Focus Type: Manual Focus (MF Only) Filter Thread Size: 52mm Minimum Focus Distance: 1m (Macro reproduction ratio 1:5) Country of Manufacture: Made in Japan Included Accessories: 1x clear vintage hard plastic storage cylinder with blue hex caps, 1x front lens cap, 1x Pentax K rear cap, 1x Jessop 52mm UV protection filter. Condition Mechanical & Exterior: The metal lens barrel is in great shape with bright, clean distance markers. The rubberized grid grip is firm, securely attached, and not sticky. The push-pull zoom/focus mechanism moves smoothly, and the tactile aperture ring clicks cleanly into place through every stop with no signs of oily aperture blades. Optics: The front glass and rear elements are clear with no major deep scratches. Internal glass is in good vintage condition.