HOYA INSTANT ACTION CONVERSION RING and HOYA INSTANT ACTION ADAPTER RING (sold separately) allow you to instantly attach and detach common screw type filters onto your lens with the help of magnet power.
* No need to remove the ADAPTER RING from the lens every time you change the filter.
Registered Patent Number: CN 209044251 U, CN 210691007 U.
Since HOYA INSTANT ACTION ADAPTER RING and CONVERSION RING system is used together with the filter, the total frame gets thicker. Please mind the risk of vignetting as follows:
APS-C size wide angle lenses at focal length less than 14mm
Full Frame wide angle lenses at focal length less than 20mm