The Asahi Pentax 50mm f/1.2 SMC is a fast standard prime for the K-mount system, sitting at the top of Pentax's manual-focus normal-lens range. With its f/1.2 maximum aperture and Super-Multi-Coating, it was designed for available-light shooting and shallow depth-of-field work on 35mm SLR bodies. It remains one of the most sought-after fast fifties from the K-mount era, and continues to attract collector interest today.

At recent UK auction, hammer prices for the 50mm f/1.2 SMC have ranged from £130 to £288 across the two recorded sales, giving a midpoint around £209 in 2026. The wider spread reflects how much condition drives value at saleroom level — clean, haze-free copies sell for a clear premium, while examples with optical or mechanical faults tend to sit at the lower end. Buyers should remember these are wholesale auction results rather than retail dealer prices, so what a tidy example is worth on a shop shelf will typically be higher.