Perfect for landscape applications and greater control over your exposures, the 49mm 7artisans ND Filter 49mm 3-Stop for Photographyis a solid 3-stop ND that enables working with a wider aperture or slower shutter speed than usually required. By slowing your exposure time or increasing your aperture, you can to control depth of field. Neutral density filters do not affect the coloration of the image and are ideal for pairing with other filters. The ultra-slim aluminum ring helps prevent vignetting when filming with wide-angle lenses or stacking multiple filters.

8 Optical Density Solid ND Filter    24-Layer Nano Coating    K9 Optical Glass    6061 Aluminum Alloy Slim Ring

• ND8 filter provides a 3-stop light reduction, which allows for longer exposures and motion blur techniques, and is perfect for landscape applications and controlling exposure when used during video recording.
• Double-sided, 24-layer coating reduces reflections on the filter's surface, resulting in greater clarity and contrast.
• Nano coating is water, scratch, and oil resistant and easy to clean.
• Filter features K9 optical glass and a slim 6061 aluminum alloy ring.

Related Questions and Answers

Q: 1. Hi there Is this ND compatible to use with Sony Fe 400/2.8—i.e. internally? Thanks

A: No, the B+W 40.5mm XS-Pro Digital ND Vario MRC-Nano Filter would not be compatible for use with the Sony FE 400mm f/2.8 GM OSS Lens. While the Sony FE 400mm f/2.8 GM OSS Lens does use 40.5mm filters, the B+W 40.5mm XS-Pro Digital ND Vario MRC-Nano Filter would be too thick for usage in the drop-in filter holder.

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. Will this work with the B&H 100mm filter holder (with the correct adapter)?

A: I can only assume it would. I have been using Lee's Lens hood with built in filter holder for years and highly recommend it.

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. Does B+W 82mm XS-Pro Digital ND Vario MRC-Nano Filter cause any vignetting and X-shadow at 15 mm end (Canon 15-35 mm RF 2.8 lens)? Thanks

A: There is a possibility of slight vignetting at 15mm.

Q: 6. I regard to the question about the front threads:Note that the specs supplied by B&H say that the mfg has not provided that info. Upon receiving this filter hoping I could add the the Nikon R1C1 flash system to it (the reason I bought this unit instead of others that had no front threads) I can tell you that the threads are well over 77MM wide. I should have figured that out when the description states the filter is oversized.

A: The front threads are approximately 81mm on the XS-Pro 77mm Digital ND Vario. While it will not be possible to use the R1-C1 mounted on this filter, the flashes on the R1-C1 separate off the ring and the system comes with stands. You could mount the flashes onto stands and ultimately a tripod and light the subject in this manner, and just use the system without having the flash on the camera.

Q: 7. Can I use a this filter for a Canon 24-105mm and Sigma 18-35mm lens?

A: Yes, but you need one more part to make it fit. You'll need what's called a step-up ring. Your Canon lens is a 77mm filter thread size and you need a step-up ring (super cheap to buy) that spans the difference (a 77mm to 82mm ring). Same for Sigma - need to find a 72-82mm step-up ring or you may have to buy two, a 72-77mm and a 77-82mm. You can shop for them here.

Q: 8. How thick is this filter?

A: The profile is rather thin. It is similar to a typical UV filter in thickness. Which is actually thin considering all of the components involved in a variable ND. One thing to keep in mind: on my 16-35mm II (82mm filter), once mounted, it does not flush with the lens. It is slightly wider (3-4mm) than the tip of the lens. It can be pretty annoying if you're trying to mount a hood.

Q: 9. 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: 10. Are there hard stops at min and max?

A: No, the filter does not have a hard stop in either direction in the rotation. And most polarizing filters in general do not have a hard stop.