This 1- to 8.6-stop, 77mm Blue Multi-Coated Variable ND Filter from K&F Concept is a variable neutral density filter providing an adjustable light reduction of 1 to 8.6 stops. It darkens the entire image evenly, allowing a photograph to be made with a wider aperture or slower shutter speed without overexposing your image. By slowing the exposure time or increasing the aperture, it is possible to control the depth of field and blur movement easily, creating a dynamic look for streams, waterfalls, landscapes, and more. This multi-coated variable neutral density filter does not affect the coloration of the image. The filter's slim design reduces possible vignetting on wide-angle lenses.

Variable 0.3 to 2.6 Optical Density    Multi-Coated    Slim Design    Darkens Entire Image    Greater Control over Exposure Settings    Allows Wider Aperture

Related Questions and Answers

Q: 1. Do they have any noticeable color shifts?

A: We have not had reports of any noticeable color shifts when using the K&F Concept Variable Fader ND2-ND400 Filter.

Q: 2. I think I have seen some VND's have a total size larger than its threading part, which ends up blocking the ability to mount a lens hood. Does the size of this filter prevent the mounting of a lens hood?

A: You will be able to mount the lens hood with the K&F Concept Variable Fader ND2-ND400 Filter on the lens.

Q: 3. 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: 4. Is there a lens cap for K&F Concept Variable Fader ND2-ND400 Filter (49mm)?

A: The back of the filter is 49mm but the front is 52mm so you can use this 52mm lens cap on it. https://www.bhphotovideo.com/c/product/807037-REG/Sensei_lc52_52mm_Center_Pinch_Snap_On.html

Q: 5. 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: 6. Is this filter suitable for solar eclipses?

A: No, the K&F Concept ND2-ND400 Blue Multi-Coated Variable ND Filter would not be suitable for solar eclipses. Using this filter for solar eclipses could result in damage to your camera, and if you are using a DSLR camera, could cause major damage to your eyes. If you are looking for a suitable option for eclipses, I would recommend this: https://bhpho.to/3VcNfph

Q: 7. Does it work in continuous autofocus mode of sony cameras with the Sony FE 28 mm f/2 Lens?

A: If the filter is set to the darker end, that may interfere with the continuous autofocus.

Q: 8. does it have a 67mm filter thread to stack another filter on top of it?

A: The K&F Concept ND2-ND400 Blue Multi-Coated Variable ND Filter (67mm) will be able hold another filter on top of it, the size of the filter to mount is 72MM.

Q: 9. Where is this filter made?

A: As per our records, this filter is made in China. Please note that this is subject to change at any time.

Q: 10. Can you please confirm this will fit on the Tamron 17-28 f/2.8 Di III RXD lens. Will the 72mm front thread accept a 2nd filter?

A: The Tamron 17-28mm f/2.8 Di III RXD Lens for Sony E has 67mm front focus threads. As such, the K&F Concept Variable Fader ND2-ND400 Filter (67mm) would be compatible to fit the front filter threads on the Tamron 17-28mm lens. A 72mm filter would not directly fit on the front of the Tamron 17-28mm lens without the use of a step-up ring such as the Sensei 67-72mm Aluminum Step-Up Ring, B&H # SESUR6772.