Dallmeyer (J.H.) 4.25 Inch f/2.9 Pentac

{"overview":"The Dallmeyer 4.25 Inch f\/2.9 Pentac is a large-format lens from the British optical maker J.H. Dallmeyer, supplied for press, aerial and technical photography during the mid-twentieth century. With just one data point, today's market value should be treated as indicative rather than established, and condition of the glass, iris and barrel will swing what any individual example sells for.","buying_guide":"Inspect the front and rear elements for cleaning marks, haze and separation, and check that the iris blades are dry and move smoothly across the aperture range.

Generated summary, 28 Apr 2026 — not checked by hand; prices on this page come from the sales, not from this text.