Not the fastest lens in the world, but this Schneider-Kreuznach G-Claron 270mm f9 is very compact and covers up to 8x10, which is pretty impressive. It's great for field cameras, although I suppose if you're already hauling around an 8x10 field camera, the appeal to compactness may have limited value to you. Nevertheless, this is an uncommon lens in excellent condition, with minor internal dust, no haze or fungus, a touch of the old Schneideritis around the element edges which will not affect imaging. Mounted in an accurate Copal No.1 shutter. Includes retaining ring.