The 1.5- to 10-stop, 77mm Nano-D Series Variable ND3-ND1000 Filter from K&F Concept rotates 360° between 1.5 and 10 stops of light reduction. It's made with Japanese AGC optical glass with 24 layers of multicoating. The glass is waterproof and scratch resistant. The filter frame is only 7.4mm thick.

0.5 to 3.0 Optical Density    Multicoated Japanese AGC Glass    Waterproof and Scratch Resistant    7.4mm Slim Filter Frame    Rotates 360° from 1.5- to 10-Stop

Related Questions and Answers

Q: 1. If using only legacy lenses, a mount adapter would always be needed, but not the ND filter. If shooting when the filter is not needed, would I have to purchase the basic mount adapter, or can I just remove the filter from the adapter?

A: Yes, that is correct. SOMETHING has to be in the filter slot 1) in order to simply keep dust and debris out of the adapter (without the ND filter or the clear filter, there would be a large opening in your adapter on which your lens connects), and 2) as the adapter was designed with the ND filter in mind, the filter becomes part of the optical formula. Without a piece of glass with the same design and size in the slot, it may affect proper focusing. As such, the Canon Drop-In Clear Filter A, B&H # CADICFA, is required when you are not using the ND filter and you do not want the effect of an ND filter on your image.

Q: 2. can you use third-party filters like breakthrough photography filters in this adapter?

A: The Meike Drop-In Filter Mount Adapter EF to EOS-R with Variable ND Filter is a lens adapter that includes a Drop-In Variable ND Filter (ND3-ND500) and clear drop in filter. It is not designed to hold any other filter.

Q: 3. Is the outer-edge threaded?. If so, what size?

A: There does not appear to be any sort of screw for mounting another lens on the front of this one.

Q: 4. Would this work with my old sigma 10-20mm 4-5.6 dc hsm and the new EOS R7? I only see the Sigma 10-20 3.5, on the compatibility list

A: The Sigma 10-20mm f/4-5.6 DC HSM lens is not compatible with the Canon Drop-In Filter Mount Adapter EF-EOS R with Variable ND Filter.

Q: 5. Will this work on a Komodo?

A: While Canon does not list compatibility of the Canon Drop-In Filter Mount Adapter EF-EOS R with Variable ND Filter with the RED DIGITAL CINEMA KOMODO 6K Digital Cinema Camera (Canon RF), as the camera uses the Canon RF lens mount, yes, the adapter should be compatible for usage on the Komodo 6K Digital Cinema Camera.

Q: 6. If I use this on a full frame camera will it change the crop factor?

A: No. This adapter does not change the crop factor.

Q: 7. The idea of a rear drop in filter holder is excellent. If you are using native R lenses, will there be a way to use a drop in rear filter feature? Funny that this feature would only apply to legacy glass.

A: No there is no option for that.

Q: 8. Can we change lenses without removing the adapter? In other words can the adapter stay in the camera when change lens?

A: Yes, the lens can be removed from the Meike Drop-In Filter Mount Adapter EF to EOS-R with Variable ND Filter without removing the adapter form the camera.

Q: 9. Will these NDs fit the Mavic Pro 2?

A: The PolarPro Cinema Series Variable ND Filter Combo for Mavic Air 2 will not work for the Mavic 2 Pro.

Q: 10. Can this be used in as a drop in rear element for a 400mm Nikon lens?

A: Unfortunately no. The K&F Concept 52mm Nano-X HD Variable ND2-32 Fader Waterproof & Scratch-Resistant Filter has a 52mm mounting thread for mounting on the front of a lens but the front of the filter has 55mm threads for using a 55mm cap or other filters. Therefore it is too large to fit into a 52mm drop in holder.