The Dallmeyer 12 Inch f/4.5 Cine is a long-focus prime lens made by the British optical maker J.H. Dallmeyer of London, intended for professional cine and projection work. With a 12-inch (roughly 305mm) focal length and an f/4.5 maximum aperture, it sits in the telephoto range used for distant subjects and tight framing on motion-picture cameras of the early to mid-twentieth century.

At recent UK auction, hammer prices for this lens have been modest, with two recorded sales in 2025 at £38 and £100 — a median around £69. As of today the value of a Dallmeyer 12 Inch f/4.5 Cine at saleroom level remains low, reflecting the niche cine-collector audience and the fact that these wholesale results exclude buyer's and seller's commission; clean, mounted examples in usable condition tend to sell for the upper end of that range while project-grade barrels make up the lower end.