Hoya Instant Action Adapter Ring and Hoya Instant Action Conversion Ring (sold separately) allow you to instantly attach and detach common screw type filters onto your lens with the help of magnet power.
How to use
Screw Hoya Instant Action Adapter Ring onto the lens
Screw Hoya Instant Action Conversion Ring (sold separately) to your screw type filter
Attach filter to the lens
NB! Hoya Instant Action Conversion Ring is sold separately.