This website seems to explain the history of the Opton brand name
http://www.zeisscamera.com/services_ove ... nses.shtml
Wikipedia also mentions Opton in the history of the Zeiss brand
It seems these are Carl Zeiss lenses made in Germany before the end of Communism, the lenses do not have any auto focus or metering capability.
Nikkor AF-S DX; 18-105 f/3.5-5.6G VR, 55-300 f/4.5-5.6G VR, 35mm f/1.8G
Speedlight SB-700 http://keystrokesukimages.com