The Angenieux 40mm f1.8 Type S2 is a fast standard prime from the French maker Angenieux, designed in the screw-mount era for compact rangefinder and small-format use. Its f1.8 maximum aperture and 40mm focal length place it between a classic 35mm wide and a 50mm normal, intended as a versatile general-purpose optic. Today it is regarded primarily as a collector's lens given its rarity and the historic reputation of Angenieux glass.

Sales data for this reference is extremely thin: a single UK auction hammer result of £18,000 in November 2024 is the only data point on file, and as a wholesale saleroom figure it sits well above what most postwar standard primes sell for. With only one sale to anchor the range and median, today's value for a clean Type S2 should be treated as indicative rather than established, and condition, originality and matching caps or case can swing the price materially. Buyers asking what a 40mm f1.8 Type S2 is worth at saleroom level should expect strong four- to five-figure territory rather than typical user-lens pricing.