How about Shanghai optic lenses

Good. Shanghai Sighton Optical lenses are clear and bright, not easy to yellow, good light transmission. Shanghai Sight-Tone Optical Lenses was founded in the 1980s Sight-Tone Optical, built in the Danyang Development Zone, is a collection of optical lens research and development, production and sales in one of the professional companies that have experienced the wind and clouds of the optical industry.