I am looking for a compact, used, 210 mm lens to take backpacking. My old eyes sure appreciate something around f5.6 to f6.3 for focusing, rather than something in the f8 to f9 range. Several that are currently available include: Rodenstock Geronar (and Caltar IIE version) MC triplet type 210; Fujinon L 210 single coated tessar type; and Komura commercial 210 single coated tessar type. I appreciate high contrast and sharpness in color landscape work. I hope that you folks can help me with recommendations about these, or perhaps other compact lenses in this focal length. Thanks!