1. Increase the strength of the square piece to protect the lens from damage. 2. With the protective support, the possibility of fingerprint coating the lens is greatly reduced, which is convenient for disassembly and assembly. 3. Applicable to all square filters with size of 100 * 150 * 2.0mm; Matched on K & F (X-Pro) series bracket. 4.It can not be disassembled and recycled after assembly. 5..Only applicable to K & F (X-Pro) system bracket after installation.
