The Olympus Pen W is a half-frame 35mm viewfinder camera from Olympus's Pen series, introduced in the late 1950s. The W variant was positioned as a wide-angle model within the Pen line, aimed at photographers who wanted a compact camera capable of fitting twice as many frames onto a standard roll of 35mm film.

At UK auction, hammer prices for the Pen W have sat in a narrow £140–£150 band across the records to hand, with both results clustered tightly around a £145 median. As of 2026, what a Pen W is worth at saleroom level depends heavily on cosmetic condition and whether the wide lens is clean and free of haze, and the thin sample size means a single strong example could push the next result higher than this range suggests.