C-mount lens by Warren Sack. This is an old lens, so there may be some minor scratches, dust, and dirt. There is slight vignetting in the corners on NEX cameras. Please be careful when shooting outdoors as it is susceptible to backlighting. (All sample photos were taken with a NEX) I loved the dreamy images it produced. When used with m4/3 cameras and a smaller image size, it creates beautiful circular bokeh in the background. Enjoy experimenting with this lens! Thank you.