The variable ND filter offers 0 (with the filter retracted) to 10 stops of light reduction all easily controlled "never requiring you to take your eyes off the viewfinder." An added benefit of putting ...

H&Y Filters has released a new variant CPL filter and Magnetic Clip-on ND filter range for its Revoring variable adapter ring system. The new Magnetic Clip-on ND filters in use. (Source: H&Y Filters.) ...