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Circular filter with retractable blades, matte black finish, knurled outer ring marked ND3 to ND1000, inner CPL ring with guide pin

H&Y

H&Y RevoRing Variable ND3-ND1000 CPL Filter 37-49mm

SKU CH-Y65K-F0VBB

Combines variable ND3-ND1000 and CPL with retractable blades fitting 37-49mm threads for 1.5-10 stops of light control

  • Variable ND3-ND1000 gives 1.5-10 stops exposure control
  • Circular polarizer uses Japanese Nitto film for 99.9% polarization
  • Retractable blade adapter fits 37-49mm threads without step rings
  • Hard stop at MAX prevents crossing the 10-stop limit
  • Guide pins on both rings improve handling and precision

Versatile Filter for 37-49mm Lenses

The H&Y RevoRing combines a variable neutral density filter and a circular polariser in one unit. Its retractable blade adapter fits any lens with a filter thread from 37mm to 49mm, removing the need for multiple step-up rings. The VND range runs from ND3 to ND1000, giving 1.5 to 10 stops of light control for both video and stills.

Suits Hybrid Shooters.

Photographers and videographers who switch between different lens diameters gain a single filter that covers the whole 37-49mm span. The built-in CPL uses Japanese Nitto film for up to 99.9% polarisation efficiency, useful for glare reduction. Buyers who need a filter for threads outside this range, or who prefer a dedicated fixed-thread filter without moving parts, should look elsewhere.

Replaces Multiple Filters and Step Rings

Once mounted, the RevoRing stays on the lens and the VND and CPL rings rotate independently for exposure and polarisation control. A hard stop at the maximum position prevents crossing into the "X" zone, while guide pins on both rings improve tactile adjustment. Markers between Min and Max reference focal lengths and stop values, helping you set the correct density for the lens in use.

Highlights

  • Variable ND3-ND1000 gives 1.5-10 stops exposure control
  • Circular polarizer uses Japanese Nitto film for 99.9% polarization
  • Retractable blade adapter fits 37-49mm threads without step rings
  • Hard stop at MAX prevents crossing the 10-stop limit
  • Guide pins on both rings improve handling and precision

Specifications

No published specifications for this item yet.

Questions about this item

What lens thread sizes does the 37-49mm RevoRing adapter fit?

The variable adapter expands to match any filter thread from 37mm up to 49mm, so a single ring covers that whole range.

Will the hard stop at MAX prevent the "X" cross-polarisation artefact on my wide-angle lens?

The hard stop locks the VND ring at the 10-stop position; the focal-length markers between MIN and MAX show the safe limit for each lens so you stop before cross-polarisation appears.

How can I verify the CPL is cutting glare effectively after mounting?

Rotate the inner CPL ring while watching reflections — Japanese Nitto film delivers up to 99.9% polarisation efficiency, so glare should vanish at the optimal angle.

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