The Alpa 11s is a 35mm single-lens reflex camera produced by Pignons SA of Ballaigues, Switzerland. Pignons built Alpa SLRs in small numbers for a niche market of users prepared to pay a premium for Swiss precision engineering, and the 11s sits within the late phase of the Alpa reflex line.

With only a single confirmed UK auction record to draw on, today's market reference point is a hammer price of £5,500 in November 2024 — a saleroom (wholesale) result that excludes buyer's and seller's commission. On that basis the Alpa 11s is worth substantially more than typical Japanese SLRs of the same era, and the price a clean example sells for is closely tied to body condition and whether period Alpa-mount glass is included.