{"overview":"The Rodenstock Imagon 120mm f\/4.5 is a soft-focus portrait lens in the Imagon A series, designed to be used with interchangeable perforated aperture discs (sink strainers) that control the balance between sharp core image and diffused halation. It was aimed at portrait and pictorial photographers working on medium and large format, and remains sought after today for its controllable soft-focus rendering rather than conventional resolution.","market_narrative":"At recent UK auction, hammer prices for the 120mm Imagon A have ranged from £130 to £380, with a median around £300 across the three sales on record. As of 2026, clean examples complete with their original disc set tend to sell for the upper end of that range, while incomplete or cosmetically tired copies are worth closer to the £130 floor — these are saleroom results, so dealer retail on a fully serviced lens typically sits higher than the price a bidder pays on the hammer.","buying_guide":"Inspect the glass carefully for fungus, internal haze and coating scratches, all of which further degrade an already low-contrast design and reduce value. Check that the aperture\/disc mechanism is clean and free of oil, that focus is smooth rather than stiff or sticky, and that the cemented groups show no edge separation. Crucially, confirm the lens comes with its full set of perforated Imagon discs — a lens missing discs is significantly less useful and worth noticeably less than one with the complete set.","specs":"A 120mm f\/4.5 soft-focus lens from Rodenstock's Imagon A line, used with interchangeable sink-strainer aperture discs in place of a conventional iris.","faq":[{"q":"What is a Rodenstock 120mm f\/4.5 Imagon A worth at UK auction?","a":"Recorded UK hammer prices run from £130 to £380, with a median around £300 depending on condition and whether the original disc set is present."},{"q":"How much does a Rodenstock Imagon 120mm sell for in good condition?","a":"A clean, complete example with its perforated discs typically sells for around £300–£380 at UK auction, while rougher copies have changed hands nearer £130."},{"q":"Why does the price vary so much on the Imagon 120mm?","a":"Value is driven mainly by optical condition (fungus, haze, coating) and whether the sink-strainer discs are included, since the discs are essential to how the lens is used."},{"q":"Is the Imagon 120mm f\/4.5 a sharp lens?","a":"No — it is a deliberate soft-focus portrait design, and its price reflects demand for that pictorial look rather than conventional sharpness."}],"confidence":55,"reasoning":"Only three unverified sales records and no SPECS or variant data were supplied, so pricing commentary is grounded but the technical description is intentionally limited to widely-known categorisation."}