About Effort:Welcome to Changchun Effort Technology CO., LTD, which is based in Chang Chun City, the famous optical base city of China. Since its inception, Effort has been involved in the design, research and development of precision optical components, thin film coating and in related instrumentation activities. Close cooperated with universities, institutes, some industrial firms and national aero-space project. We will be happy to quote for all custom optics.We are the direct manufacturer, and we have trade department, in order to provide complete pre-sales and post-sales support. Trade department:                                  Read More →