Original vintage asahi pentax auto extension tube set for pentax mount

4 Asahi Pentax Auto Extension Tube Set K – Original Vintage Pentax Accessory This is an authentic, original vintage Asahi Pentax Auto Extension Tube Set K, consisting of the complete three-piece set of Tubes #1, #2 and #3, designed for Pentax K-mount cameras and lenses. These genuine Pentax extension tubes are a classic macro photography accessory from the peak era of the Pentax K-mount system. When placed between the camera body and lens, they increase the distance between the lens and the film plane or digital sensor, allowing the lens to focus much closer than its normal minimum focusing distance. This makes it possible to achieve high-magnification macro photography without adding any extra glass elements. The authenticity of this set is evident throughout its construction. The tubes feature the characteristic “ASAHI PENTAX JAPAN” engraving, with the original factory font, spacing and styling associated with Asahi Pentax accessories of the period. The knurled metal grip rings, silver release pins and distinctive #1, #2 and #3 numbering all correspond to the original factory design. The set also includes its original textured black leather storage case, featuring the authentic debossed “ASAHI PENTAX” logo on the front flap. The case remains in good vintage condition, although the leather shows some cracking consistent with its age. It still retains its original character and remains a very attractive part of this vintage set. The rear lens cap is also a genuine vintage Asahi factory cap, marked “ASAHI OPT. CO. JAPAN”, further supporting the originality of the set. The extension tubes themselves are in excellent vintage condition, as shown in the photographs, including the original red inner lining. They have the proper period construction, markings and finish expected from a genuine Asahi Pentax accessory. A particularly nice set for Pentax collectors, vintage camera enthusiasts and macro photographers, combining practical functionality with authentic period Pentax design. Unlike many third-party extension tube sets from the same era, this is a genuine factory-made Asahi Pentax accessory set, rather than a Vivitar, Kenko, Soligor or other aftermarket product.