Nikon Nikkor-Q 260mm f/10 wide-angle Lens. Serial # 600081. Black Barrel. Single Coated glass. Image circle 800mm at f/22. Coverage at full aperture or 74°. Front filter diameter 86mm. Rear lens filter diameter 86mm. Aperture range F/10 - F/32. Cosmetic condition is Ex++ or 9 of 10. NO dents or dings. Clean glass with some dust spots inside visible with flashlight ONLY. NO haze or fog. NO coating marks.

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Nikon made four Process-Nikkor lenses, all four elements in four groups double Gauss types with minimum aperture of f/32. Very similar – identical, but for the name – lenses were sold as Nikkor-Q before the name Process-Nikkor was used. Nikon does not claim that these lenses are apochromatic and does not recommend that they be used outside their usable range of magnifications. I have a Nikon catalog that says this about them: The wide picture angle design of Process-Nikkor lenses makes for larger subject area coverage than obtained with conventional lenses at the same working distance. In addition, this distance can be reduced for the same subject area, meaning the camera equipment can be compact. Although the maximum aperture ratio is 1:10, these lenses have large diameters and minimal vignetting 68° subject area coverage at full aperture or 74° coverage when stopped down to f/22. Process-Nikkor lenses assure remarkable flatness of the image over the entire image area. They provide quick and low-cost photoengraving for monochromatic reproduction. The lens construction is 4 elements in 4 groups, and their configurations are symmetrical so they can be used for either enlargement or reduction without reversing. The Process Nikkor is the lens for the big industrial camera over 8x10, 7x17 and 12x20 inch format. An image circle is 800 mm at F22 !! Therefore, the lens is highly efficient.

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 Sells with NO RESERVE at price of $345. I have more Nikkor Large Format Lenses, Large Format Cameras and Accessories, Medium format cameras and Soft Focus Lenses. More great buys on my other Auctions, eBay Store and web page.