-4.0 (labeled -4.5) corrective diopter for 6000 and Hy6 pop up magnifiers in the WLF
The stock WLF magnifier are fitted with a minus -0.5 diopter so even though this is labeled a -4.5 it's true value is -4.0 diopters effective correction. The installation is fairly straight forward. Remove your WLF from the camera, open it, and flip up the magnifier. From the underside you can see the diopter value and that it has two tabs. You just rotate the diopter until the tabs are free and remove it. Installation is the reverse of these steps.