This 1- to 8.6-stop, 67mm K&F Concept Blue Multi-Coated ND Filter 67mm 1-8.6 Stopfrom K&F Concept Blue Multi-Coated ND Filter 67mm 1-8.6 Stopis 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. Would this fit or which will fit a Sony A7 IV 28-70mm Lens?

A: You would need the 55mm version of the K&F Concept Variable Fader ND2-ND400 Filter (72mm).

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. 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: 4. 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.

Q: 5. Can I use this to photograph an annular (ring of fire) eclipse?

A: No, the K&F Concept Variable Fader ND2-ND400 Filter (67mm) is not for solar photography and one you can damage one's eyes and possible the camera. Best would be to use one like, https://bhpho.to/45StKoi.

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. What is the frequency response of the K&F Concept Variable Fader ND2-ND400 Filter (40.5mm)?

A: Unfortunately, the specs of the K&F Concept Variable Fader ND2-ND400 Filter (40.5mm) do not list frequency response. The specs we do have is that if you turn the filter you can change the density of the filter from 1 to 8.6 stops.

Q: 8. 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: 9. Is there any polarization effect with this filter?

A: The K&F Concept ND2-ND400 Blue Multi-Coated Variable ND Filter (82mm) reduces exposure, but there is no polarization effect.

Q: 10. What size slip-on cap fits the 77mm size? Spec says front is 82mm; only push on is Kaiser 82 & people say it it's not a 82mm.

A: We check the K&F Concept Variable Fader ND2-ND400 Filter (77mm) in the store and it has 82mm front threads. So you can use an 82mm front clip on filter such as this: https://bhpho.to/4aMTVOT