The 72mm C-Series Variable ND2 to ND400 Filter from K&F Concept reduces light intake from 1 to 8.66 f-stops. Intended for long exposure and motion blur, it is suitable for rivers and waterfalls, especially under strong light. The filter is made of high-end Japanese optical glass. The ultraslim filter frame is designed of aluminum alloy, which is only 7.3mm thick. Its design prevents wide-angle vignetting and is not recommended for use with wide-angle lenses with focal lengths of 35mm.

High Transmittance, Low Reflectivity    Double-Sided Multilayer Blue Coating    9 Stops Adjustable    Aluminum Alloy Frame

The ND2-ND400 filter reduces light intake from 1 to 8.66 f-stops. It is intended for long exposure and motion blur and suitable for rivers, waterfalls, and other water surfaces, especially under strong light.

The filter is waterproof and dustproof.

The ultraslim filter frame is designed of aluminum alloy, which is only 7.3mm thick. Its ultraslim design prevents wide-angle vignetting, which is not recommended for use with wide-angle lenses with focal lengths of 35mm.

The VND allows the use of slow shutter speeds on high-speed films or digital cameras to record movement/image blur in waterfalls, clouds, or fast-moving subjects.

The filter is made of high-end Japanese optical glass, which is comprised of a double-sided multilayer blue coating.

The silicone material is soft and smooth, skin-friendly, not easy to stain, dirt-resistant, and easy to clean. It protects the variable ND filter.

Related Questions and Answers

Q: 1. Is this the K&F filter with click stops @ each setting??

A: No, these filters don't have click stops.

Q: 2. What is the front diameter size of 82mm thread? Does it fit inside Tiltaing Mini Matte Box?

A: The K&F Concept Variable Fader ND2-ND400 Filter (82mm) has an 86mm front diamter. However, please be aware that there are no front threads on filter, therefore you can not connect mattboxes with adapter rings. As for Tilta Tiltaing Mini Matte Box, they only offer adapter rings up to 85mm.

Q: 3. Das it work with the 'Tiffen 82mm Variable Neutral Density Filter'? The output has more than 82mm

A: No, the K&F Concept Soft Silicone Cap for Variable ND Filters (82mm) does not fit the Tiffen 82mm Variable Neutral Density Filter.

Q: 4. Will these caps fit over the Tiffen 77mm or 82mm Variable ND?

A: Unfortunately no. The K&F Concept Soft Silicone Cap for Variable ND Filters (77mm) will only fit the K&F variable ND 77mm filters.

Q: 5. Could I use a 62mm cap?

A: Yes. The K&F Concept Variable Fader ND2-ND400 Filter (58mm) had 62mm front threads which can be used with a standard 62mm snap on lens cap such as this: https://bhpho.to/3DjuEgF

Q: 6. Will it fit Sigma 16mm F1.4 DC DN EF-M?

A: Yes, as the Sigma 16mm f/1.4 DC DN Contemporary Lens has 67mm filter threads on the front of the lens, the K&F Concept Nano-X Variable Fader NDX HD Green-Coated Waterproof Anti-Scratch Japan Optics Filter (67mm, ND2-32) is compatible for use with the Sigma 16mm f/1.4 DC DN Contemporary Lens.

Q: 7. Will the 77 and 82mm caps fit the Monofotto Xume magnetic filter adapter sets with the filter installed and not?

A: The K&F Concept Soft Silicone Cap for Variable ND Filters is designed to fit over the filter and lens with the corresponding size.

Q: 8. 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.

Q: 9. Does anyone know the difference between all the series of ND filters from K&F concepts (ie, nano, B-series, C-series, etc)??

A: The K&F Concept Nano X-Pro Variable filters features double-sided multi-coating and advanced Nano-coating that effectively minimizes reflections and improved image clarity. These are considered the top of their line. The K&F Concept B-Series filters features 8 layers of coating with good optical quality that is suitable for most photography needs. The K&F Concept C-Series are the base level filters with double-sided multilayer blue coating.

Q: 10. will this fit a nikon af-s nikkor 24-120 lense?

A: The Nikon AF-S NIKKOR 24-120mm f/4G ED VR Lens B&H # NI241204GAF has 77mm filter threads. Therefore the 49mm filter will not work. This one is the one you need. ZEISS 77mm Carl ZEISS T* Circular Polarizer Filter B&H # ZEPOLF77.