I am looking to get a fast c-mount lens in the 20 to 25mm range with an aperture of at most 2.0, Possibly 2.8 but rather it be less. I also am looking for full sensor coverage too and i would rather not have the price be too close to a native µ4/3 lens in that focal length because then it would be pointless. My whole reasoning is to same money and size. I have seen so many lenses that people used, and there are many different prices for them. Some cheep ones cover the whole sensor but are cheep quality and not the best IQ and then there are some that are over two or three hundred dollars, with great IQ but don't cover the sensor and vignette to different degrees. Can anyone suggest any decent compromise or middle of the rode lens to look for, and that fits my criteria and wallet?