To put a second filter over the top of one of the first do the same thing with one of the two filters on either side of the filter already inserted. Centre
To release the filters just press the opposite finger plates in a little way. Right
Pro 4 filters should be loaded with the lettering on the top left hand
corner as you load. If you are loading oblong filters the distance
between the claws is 68mm.
The Pro 4 hood is now operational and all of the four filters in the hood
are ready for instant use.
Fit the adapter ring onto your camera lens first.
Slide the Pro 4 hood
over the adapter ring making sure that the three clamps engage and click
into place.