Optolong Optics Co.,Ltd. is the brand owner of optolong who is the joint of industry and trade. Founded in 1999, Optolong has become an integrated enterprise not only specialized in R&D, but also good at manufacturing astronomy filters and fluorescence filters and pushing them to market. We also offer other interference filters like UV filters/lens, visible filters and Near infrared filters, beam splitter, anti-reflection coating and optical mirrors/windows as a OEM service.

Located in Kunming city in China which is one of the four optics centers and the coating experience of 20 years (since 1999) enable us to design and produce the filters with most sophisticated spectrum. Optolong We are glad to declare that Optolong has been become the first and only non-replaceable brand for astronomical filters in China. Optolong brand is also known as the comparable filters with international brand by distributor client around the world.

Optolong is ISO 9001:2015 certified company(Certificate No.00119Q32401R0S/5300). All the process about management, product design, manufacture, delivery, customer support are within the standard operation. It is the only standard based on a number of quality management principles including a strong customer focus, the motivation and implication of top management, the process approach and continual improvement. We would keep a high standard to work for our clients.