Dollice Lens Mount Adapter Suit For Contax CY Lens to Sony E Mount NEX Camera Both camera-side and lens-side of the adapter are made of brass, precision-machined and plated with chromium Precise fit and solid connection - lens has no play, gap or wiggling when mounted on adapter and no adjustments are required to fit your lens. Designed to reach infinity focus while maintaining the correct registration distance required to support CRC lenses or lenses with floating elements. Note: Turn on 'shoot without lens' to use MF lenses with adapters. Compatible with: Contax CY Lens, Sony NEX E Mount Camera