{"overview":"The Mamiya RB67 210mm f\/4.5 is a medium-telephoto Sekor lens for the RB67 6×7 SLR system, sitting roughly equivalent to a short tele on 35mm and aimed at portrait and product work on the studio-oriented RB67 platform. It uses the bellows-focused RB67 mount and dates from the mainstream era of the system, making it a common partner to the standard 90mm.","market_narrative":"At UK saleroom level the RB67 210mm f\/4.5 is an affordable telephoto: the only logged hammer result in our records is £110 in November 2025, which gives a sense of what a clean, working copy sells for in the auction market today rather than at retail. With just one data point the spread is narrow, so buyers wanting to know what this lens is worth should treat that figure as indicative of mid-condition value rather than a firm price ceiling.","buying_guide":"Inspect the front and rear elements under a torch for fungus, haze and cleaning marks, since the larger tele groups can hide internal dust and bloom. Work the aperture blades at several stops to confirm they are dry and snappy with no oil bleed, check the focusing helicoid on the body for smoothness, and look at the rear coating for scratches and any sign of element separation around the cemented groups.","specs":"Key specifications from the supplied data are limited to a 210mm focal length at f\/4.5 maximum aperture in the Mamiya RB67 (non-Z) bayonet mount; no further optical or mechanical figures are provided.","faq":[{"q":"What is a Mamiya RB67 210mm f\/4.5 worth today?","a":"Based on our UK auction records the lens sold for £110 hammer in late 2025, so a working copy is worth around that figure at saleroom level before commissions."},{"q":"How much does a Mamiya RB67 210mm f\/4.5 sell for at auction?","a":"The single recorded hammer price in our data is £110, which is a useful guide to the current value of an average-condition example."},{"q":"Is the RB67 210mm f\/4.5 the same as the Sekor Z 210mm?","a":"No — the Sekor Z 210mm is for the RZ67 system, while this Sekor 210mm f\/4.5 fits the earlier RB67 bayonet and is not interchangeable."},{"q":"What should I check before buying one?","a":"Look closely for fungus, haze, oily aperture blades, coating scratches and any stiffness in focus, as these are the main faults that drag the price below the typical range."}],"confidence":35,"reasoning":"Specs are minimal and only one verified sale is available, so pricing commentary and technical detail are necessarily thin."}