Taiwan Provincial Standard of the People's Republic of China
Latest
CNS 5145-1980
Scope
This standard applies to photographic filter sizes (framed and unframed), and can be applied to various types of filters, including glass (solid and laminated) types, plastic types sandwiched between glass, and gel type filters. .
CNS 5145-1980 history
1980CNS 5145-1980 Optical Filters for Photographic Equipment (Mounted and Unmounted)