Your Optical Filter Partner

Dear Customers,

Due to our company business development, our company’s English name has changed from “Yulong Optics Co., Ltd” to “Optolong Optics Co., Ltd” since 9/29th/2016. Our business, service and legal relationship keep the same.

Thank you for your support and understanding. If you have any problems, please feel free to contact with us!

Kind Regards
Optolong Optics Co., Ltd