1. Only UV filters can transmit 98.5 % of light; CPL filters cannot be expressed in terms of light transmission, 2. Only CPL /VND filters are adjustable, other filters are not.
Feature:
1.Magnetic Snap-On Magnetic design, aluminum frame, attaches in 1 second. 2.Smooth Gimbal Movement Ultra-thin aluminum rim, no need to remove before power off. 3.Optical Glass Clarity High transmittance, vivid colors, no distortion or ghosting. 4.Multi-Coated Protection Water/oil/dust resistant coating, easy wipe-clean, durable.