This 3- to 7-stop, 49mm Nano-X Magnetic Variable ND Filter from K&F Concept allows you to quickly install the filter adapter ring on the lens thanks to its magnetic properties. The filter utilizes cutting-edge technology to avoid the common "X" cross on a wide-angle and telephoto lens. Both sides of the glass have nano-coating layers that make it waterproof, scratch resistant, and glare resistant, effectively protecting the camera lens.

Variable 0.9 to 2.1 Optical Density    28-Layers of Nano-Coating    1-Second-Swap Magnetic Filter    Avoids Common "X" Cross    Waterproof and Dustproof

This variable ND8-ND128 filter with magnetic technology can be installed in seconds for a faster installation than traditional thread filters.

The adapter ring has a thread to be screwed onto the lens. The ND8-ND128 magnetic filter engages in a magnetic way. Magnetic adapter rings are also suitable for other magnetic filters such as the magnetic CPL, magnetic ND8, magnetic black mist, and the magnetic ND1000 by K&F Concept.

K&F Concept utilizes cutting-edge technology (frame self-lock) to avoid the common "X" cross on a wide-angle and telephoto lens.

Both sides of the glass have nanometer coating (a total of 28 layers) that makes it waterproof, scratch resistant, and anti-glaring, effectively protecting the camera lens.

Related Questions and Answers

Q: 1. 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: 2. Can 72mm XS-Pro Digital ND Vario MRC-Nano be able to fit Sony FE 16-35mm F4 ZA with XS-Pro UV or UV + Polarizer without Vignette?

A: If filter diameter on your lens is 72 mm there will be no vignett with any 72 mm filter. Vignetting only occurs if the lens does not match crop factor for camera.Hope this helps.

Q: 3. Can I use this on my Nikon wide-angle lens 10-24mm without vignette?

A: Most likely, no. The rim on this filter being the variable midel, is much wider than a standard ND would be. You definitely need to find a fixed stop ND for a wide angle. Even with that, you may still have slight vignetting at the 10mm end.

Q: 4. 82mm. Does this filter have "front threads", for instance to screw on a lens hood?

A: The following system offer 86mm Front Filter Threads.

Q: 5. https://www.bhphotovideo.com/c/product/1081648-REG/zeiss_2059_812_front_lens_cap_86mm.html (Can this lens cap be used?)

A: B+W 82mm XS-Pro Digital ND Vario MRC-Nano has an 86mm front threaded diameter. ZEISS 86mm Front Lens Cap would be perfect for your filter.

Q: 6. 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: 7. Does the front filter thread rotate when changing ND Amount? Looking to add a step up ring and go to a matte box.

A: Yes, the front threads on this filter are a 86mm size.

Q: 8. How thick is this filter?

A: I don't have this filter. Not sure why I was asked by BH to answer the question. Sorry.

Q: 9. Does this filter work with an M.Zuiko Olympus F2.8 Pro 12-40mm?And would a step down ring 52-62mm cause vignetting?

A: It will work with that lens. If your using a 52-62mm step up ring from a smaller lens you will be ok. If your using a step down to put a 52mm filter on a 62mm lens then you will most likely have vignetting.

Q: 10. Does this filter vignette with a Panasonic 8-18 lens at 8mm with gh5s?

A: This is a 72mm filter, the Panasonic Leica DG Vario-Elmarit 8-18mm f/2.8-4 ASPH. Lens has a 67mm filter thread. Instead you would need BH #BWNDVXSP67 for that lens. https://bhpho.to/2YH9VNd