RevoRing Mark II: the adjustable mount is the main reason to buy
A traditional shared filter needs the correct ring whenever it moves to a lens with a different front diameter. The RevoRing’s adjustable mount is designed to handle the stated size range directly. On a kit with 67mm, 72mm and 77mm threads, that can reduce the number of adapters you carry and the number of ring decisions during a lens change.
Mark II uses three locking levers. Follow the manufacturer’s mounting sequence and confirm secure seating on each lens; adjustable does not mean you can skip the locking step. A filter that moves between lenses still needs deliberate handling, especially when the camera is being carried between shots.
The range is a boundary, not a suggestion. The product covered here is the 67–82mm version. A 58mm lens is outside its lower limit, and an 86mm lens is outside its upper limit. H&Y offers other ranges, but selecting a different range is a different purchase; do not order this version solely because “RevoRing fits many lenses.” See H&Y’s Mark II mounting overview.
Haida PROII: straightforward threaded mounting
Haida PROII is bought in a specific thread diameter. If you mainly use one 77mm lens, a 77mm filter can be the direct and less expensive answer. If your lenses differ, choose a shared larger filter and add direct step-up rings. There is no need to pay for adjustable mounting when the filter rarely changes lenses.
The familiar screw-in setup also makes the parts easy to account for: filter diameter, each lens thread and the ring that connects them. The inconvenience appears during changes, when a ring must be moved or swapped. Some buyers keep a matched ring on each lens, then move only the filter, but they still need to check cap and hood arrangements.
For exact ring selections, use the lens-to-filter size selector. It links to the actual current variants instead of leaving you to interpret a generic ring listing.
ND3–ND1000 versus 3–7 stops: compare the actual meaning
The RevoRing label describes density factors. Stops are calculated as log2 of the factor, so ND3 is approximately 1.6 stops and ND1000 approximately 10 stops. It does not mean a 3–10 stop filter. The Haida PROII is specified as 3–7 stops. The two lower ends and upper ends therefore do not match.
That matters in practice. A shaded video scene may need less reduction than 3 stops, while a long-exposure plan may need more than 7. Work backwards from your shutter, aperture and light level. The wider labelled range can be useful, but the last setting is not automatically the right setting for every lens, scene or polarization angle.
Haida’s PROII product introduction explains the separate ND and polarization adjustment. Keep density and reflection control as two deliberate decisions rather than turning controls until the image merely looks darker.
Using VND and CPL together
First choose the exposure you need, then tune polarization for the reflections you want to manage. Recheck exposure after adjustment because polarization can change the brightness of parts of the scene. A useful setting on water may be excessive on a product whose shape depends on reflections.
On a wide view of a blue sky, look for uneven polarization. At strong ND settings, inspect the image for uneven density or corner issues with the exact lens and framing. Neither a price premium nor a broad advertised range removes the need to evaluate the scene you are recording.
The generated images illustrate the kit and workflow. They are not photographs from an optical or flash performance test.
