The Asahi Pentax Takumar 135mm f/3.5 is a short telephoto prime from the M42 screw-mount era, designed as a compact portrait and middle-distance lens for Pentax SLR bodies. It sits within the broader Takumar family that earned a reputation for solid mechanical construction and dependable optical performance at a modest price.

With only one tracked UK auction result — £50 in June 2022 — the Takumar 135mm f/3.5 sits firmly in the budget tier of vintage M42 telephotos, and a clean working copy is generally worth around that figure at saleroom level today. Hammer prices for this lens are wholesale auction results before commission, and in 2026 the model still sells for similar money when a tidy example appears, with rougher copies typically going for less. As only a single data point is available, treat the £50 figure as indicative rather than a firm market median.