★ Post-War Contax / Zeiss Opton Sonnar Opton Sonnar 50mm / F1.5 I have been using this lens for over 10 years after purchasing it as an overhauled item. Both the exterior and the optics are, I think, in good condition considering its age. There are no signs of mold or haze that would affect the image quality, and there are some of the water bubbles typical of Zeiss lenses of the time. (These do not affect the image quality.) There is a little oil stain on the aperture blades, but the movement is smooth and there are no problems. Tested on Contax bodies and with a mount adapter. Unlike Gauss-type lenses, this lens does not produce swirling bokeh, but rather beautiful and soft bokeh. At F1.5, the center is sharp within the softness, and stopping down to F2-2.8 increases the sharpness, resulting in a well-balanced image. The color reproduction is also natural, and I think it is superior to Nikon and Leica lenses of the time. I used it with a Leica M digital camera via a mount adapter, and I thought the image quality was still good enough for modern use. ★ Includes two aftermarket lens hoods These are aftermarket lens hoods that can be screwed into the 40.5mm filter thread of this lens. There is a deep hood for high light-shielding effect and a compact slotted hood.