we have full set of testing equipment: ultraviolet Spectrophotometer and optical testing bench each one set, Digital laser interferometer 2 set, Lens resolution instrument 2 set ,Two dimensions measuring instrument 1set. Profiler 1 set. Green.L specialized in the production of various kinds of products, such as led ring light, tripod, camera filters, selfie stick, bayonet adapter rings, digital adapter tube, camera lens, lens hoods, lens cap, cleaning kit and so on. Not only Green.L is the domestic well-known brand, but also the large scale OEM factory like Foxconn. The shipment increasing rate 20% each year from 2010-2014. In 2013, according to statistics, every 4 DSLR camera, there is a use of Green.L filter. Our company is cooperation with many international famous photographic equipment brands. Based on quality first, service highest, For product development, production and sales, Green.L strictly controls all aspects of product development, production and sales. In the fierce market competition, the company's products are showing strong vitality with novel styles, reliable quality, considerate service and reasonable prices.