Designed for use with the Canon Drop-In Filter Mount Adapter EF-EOS R, this Drop-In Variable Neutral Density Filter A is an intuitive and sleek means for using a variable neutral density filter in conjunction with an adapted lens, especially those lenses lacking traditional filter threads. This variable ND filter is permanently installed within a drop-in holder and has an integrated wheel for adjusting the rotation position to alter the ND effect.

The variable ND filter provides 1.5 to 9 stops of adjustment and creates a darkening of the entire image for photographing with a wider aperture or slower shutter speed than normally required. The degree of density is easily controlled by rotating the filter, helping you to predetermine the additional exposure length required. By increasing your aperture or slowing your exposure time, you are able to control depth of field and convey movement more easily.

Reduces Exposure 1.5 to 9 Stops    For Drop-In Filter Mount Adapt. EF-EOS R    Integrated Filter Rotation Wheel    Reduces Exposure, Darkens Entire Image    Allows Reduced Shutter Speed    Allows Wider Aperture

Related Questions and Answers

Q: 1. Will this fit canon drop in filters?

A: No, Neewer EF to EOS R Mount Adapter with Variable ND Filter (1.5-9 Stop) uses a properitary drop in filter.

Q: 2. How big is the actual filter? Will this drop in to the 52 mm filter slots at the back of Canon telephoto lenses?

A: I don't have the actual dimensions but the filter is permanently mounted in the holder and it will only fit into the canon drop in filter mount adapter. See BH #CAMAEFRFDIND.

Q: 3. Will this drop in the Canon 300mm 2.8 just like the Polarizer Filter will?

A: Canon Drop-In Variable ND Filter A (1.5-9 Stop) is compatible only with the Canon Drop-In Filter Mount Adapter for EF-EOS - R lenses. It will not fit on Canon EF 300mm f/2.8L IS II USM Lens. You can use fixed ND filters with the following product: 1-Canon - Drop-In Filter Holder for 52mm Screw-In Filters BH #CAFHS52 https://www.bhphotovideo.com/c/product/186092-REG/Canon_2612A002_Drop_In_Filter_Holder_for.html/accessories

Q: 4. Does the variable ND drop in filter fit in the Canon ef -R 0.71 speed booster?

A: No, the Canon Mount Adapter EF-EOS R 0.71x (seen here: https://bhpho.to/3OmrCw5) does not accept the Canon Drop-in Variable ND Filter A.

Q: 5. Does this have the option to not use any ND, while keeping the filter in the adapter to avoid dust seeping into the hole?

A: You will need to add this clear filter to the drop in filter slot in the Canon EF RF filter adapter. This filter will make sure no dust gets in the camera. https://www.bhphotovideo.com/c/product/1434115-REG/canon_3444c001_drop_in_clear_filter_a.html

Q: 6. Does this filter have click stops for each ND stop? If so, do the click stops work even when the set screw/knob is removed?

A: No, the filter has no stopping when changing the filter strength. It is smooth throughout, with no hard stop.

Q: 7. What is the front thread size for the 55mm filter?

A: The Hoya Variable Density II ND Filter (1.5 to 9-Stop ) does not have front filter threads.

Q: 8. Up to how many stops can it provide?

A: The headline and specs both say 1.5 to 9 stops.

Q: 9. Will this work with the Canon EF 800mm f/5.6 L IS USM lens?

A: Unfortunately the Canon Drop-In Variable ND Filter A (1.5-9 Stop) is not compatible with the 800mm lens. Currently there are no variable ND filter options for the 800mm RF f5.6 lens. You can use a solid ND 52mm using the holder that comes with the 800mm lens.

Q: 10. Is there a non-variable ND drop in filter for this mount? Like a set of multiple NDs? I can't stand the color shift and increased contrast variable NDs create. I'd much prefer to just carry around a few drop in's at varying ND levels

A: We're afraid not. At this time Canon does not offer any alternative ND Filters for this system.