Pentax
The vintage Asahi Pentax Extension Tube Set (I, II & III) with Case is a classic 3-piece macro photography accessory designed for vintage 42mm universal screw mount cameras. It physically sits between the camera body and the lens, extending the focal path to significantly lower your minimum focusing distance. This allows you to shoot extreme close-up images without buying an expensive, dedicated macro lens.
Key Specifications & Features:
Mount Type: Universal M42 Screw Mount (42mm x 1mm thread pitch).
Included Components: Three varying lengths of metal extension tubes labeled I, II, and III, plus the original protective hardshell storage case.
Modular Setup: Tubes can be screwed together in any sequence or used completely solo (e.g., just Tube I, Tubes I+II, or all three combined) to achieve your targeted magnification ratio.
Zero Optical Degradation: Because extension tubes contain no glass or optical lenses inside, the absolute sharpness, color saturation, and native imaging characteristics of your prime lens are completely preserved.
