This 1- to 8.6-stop, 37mm 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. Are these filters glass or resin?

A: The K&F Concept ND2-ND400 Blue Multi-Coated Variable ND Filter (72mm) is a glass filter.

Q: 2. Is it best to put this VND on before or after a mist filter?

A: It generally does not matter if you put the K&F Concept Variable Fader ND2-ND400 Filter (82mm) on before or after a mist filter, it can come down to preference.

Q: 3. 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: 4. Will this work with the Sony A7SIII?

A: This filter will work with any lens with a 67mm thread.

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. 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. Doesn't the blue coating affect the hue of the picture? Is there a blue tint?

A: The blue coating on this filter has no negative effects in terms of the hue in your images.

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. I just bought this filter and I experience something weird. When I turn it over the darker ND dot, the filter seems to go even darker and the photo look like a IR shot (all purple). Yesterday I set the filter at his darker point. I took a photo : f.14, 2.5s, iso 100. Then I turn further the filter and it became darker. So I change the time and I hand to go further as 60sec to get proper expose photo.. but in the viewfinder, it was all purple. Is that normal? I use it on Olympus em10II and 14-42 kit lens

A: The K&F Concept ND2-ND400 Blue Multi-Coated Variable ND Filter (58mm) is only rated to perform properly till 8.6 stops. Going beyond the specified maximum may degrade image quality. Additionally with higher levels of light reduction one runs the risk of IR pollution in the image. As you reduce visible light you are more suspect to this pollution, which could be why you are seeing the strange colors.

Q: 10. 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.