The Asahi Pentax FA 77mm f/1.8 Limited is a short-telephoto prime for the Pentax K-mount (KAF) 35mm SLR system, part of the FA Limited trio aimed at portrait and available-light shooting. Its 77mm focal length and f/1.8 maximum aperture were chosen to give a slightly long, fast portrait lens with a compact aluminium-barrelled build.

UK auction activity on this lens is thin: the only verified hammer result in our records is £325 in March 2022, achieved at saleroom level (wholesale, before commission). With a single data point that price is best read as an indicative value rather than a firm market median, and clean, boxed examples typically sell for more than user-grade copies in today's market.