This 4 to 9-stop, 77mm Haida NanoPro Variable ND Filter 77mm 4-9 Stopprovides an exposure reduction of 4 to 9 stops. The 1.2 to 2.7 optical density creates a darkening of the entire image, allowing you to photograph with a wider aperture or slower shutter speed than normally required. The degree of density is easily controlled by rotating the front filter ring, helping you to predetermine the additional exposure length required. By increasing your aperture or slowing your exposure time, you are able to control depth of field and convey movement more easily. For easier, repeatable control over density settings, the front ring is also visually demarcated with dots that represent different density values and includes a rotation lever to further enable fast, as well as precise positioning of the front ring.

This filter is constructed from optical glass for clarity and color fidelity. To prevent internal ghosting and reflections, each glass surface includes 10 layers of anti-reflection coatings, which also offer greater protection to the filter substrate and help keep it clean for a longer period of time. The Nano coating associated with the Haida 77mm NanoPro Variable Neutral Density Filter provides an additional layer that results in an improved beading effect when the surface comes in contact with water or oil, allowing for more efficient cleaning.

Variable 1.2 to 2.7 Optical Density    Multicoated & Nano Coated    Optical Glass Construction    Darkens Entire Image Area    Greater Control Over Exposure Settings    Reduce Shutter Speeds, Widen Apertures    77mm Front Filter Threads    Filter Ring Rotation Lever    Plastic Case

Variable neutral density filter allows you to apply differing amounts of density from scene to scene.

1.2 to 2.7 optical density filter darkens the image, allowing you to photograph with a longer shutter speed or wider aperture than normally required.

Providing an exposure reduction of 4 to 9 stops, this filter allows you to control depth of field and convey movement more easily.

Offers increased flexibility to use specific ISO settings or ISO films under bright ambient light.

Provides increased exposure flexibility while using cinema or video cameras within a designated film frame rate.

Constructed from optical glass for clarity as well as color fidelity.

Multicoated to prevent internal ghosting and reflections.

Nano coating provides an additional layer that results in an improved beading effect when in contact with water or oil for greater cleaning efficiency.

Aluminum-alloy filter ring with 77mm front filter threads allow for use with other filters.

Side lever allows the filter glass to be easily rotated.

Plastic filter case for storage and transport.

Related Questions and Answers

Q: 1. Which stack caps or covers fit this filter for protection when not in use?

A: There are several caps for the SmallRig 77mm MRC Variable ND Filter on the product page, under the "Accessories" tab: https://www.bhphotovideo.com/c/product/1681507-REG/smallrig_3590_77mm_mrc_variable_nd.html/accessories

Q: 2. Can the adjustment knobs be removed?

A: The knobs on the Neewer 2-in-1 Variable ND2-ND32 & CPL Filter (77mm, 1 to 5-Stop) are non-removable.

Q: 3. will the lens hood fit over the magnetic ring for my rf 24-105mm?

A: Unfortunately the magnetic ring will block the lens hood from being attaches to the lens.

Q: 4. is this filter stackable? are you able to place another filter on top of it? does it have threading on the outer portion?

A: Neewer 2-in-1 Variable ND2-ND32 & CPL Filter (77mm, 1 to 5-Stop) has 82mm front thread to attach lens caps or other filters.

Q: 5. Does the magnetic adapter ring that screws on the lens contain a 1-stop polarizer like the Freewell's base filters do with their system? Or is Haida's adapter a 0-stop CPL? I want the ability to remove the top VND filter when moving from bright to low-light environments, without having another stop of reduction below it (in the adapter).

A: The magnetic adapter ring in this Haida NanoPro kit does not contain a polarizer.

Q: 6. Will the Haida magnetic vnd filters vignette on a 15mm lens? I have the Laowa 15mm f/4 macro.

A: The Haida 77mm NanoPro Magnetic Interchangeable Variable ND 2-Filter Kit could possibly cause slight vignetting using the 15mm lens.

Q: 7. How thick are these filters?

A: The Haida NanoPro Magnetic ND3.0 Filter (95mm, 10-Stop) is 3.1mm thick.

Q: 8. Does this produce an X-Pattern at max ND?

A: It does at just beyond max, I just back it off a tiny bit and it's fine. The ND range is large enough that if you need to go beyond max, it's a sign that adjusting the ISO a touch might be a good idea.

Q: 9. What can I use as a front cap for this item (dont tell me Schneider 86mm Push-On Cap because it does NOT fit)?

A: This Sigma LCF-86 III 86mm Lens Cap is compatible with the Genustech 82mm Variable Neutral Density and Circular Polarizer Filter. https://www.bhphotovideo.com/c/product/1168370-REG

Q: 10. Is the thumb screw removable for use w/ a lens hood?

A: According to the manufacturer, the thumb screw on the the SmallRig 77mm MRC Variable ND Filter can be removed. However, SmallRig recommends not to use this filter with a lens hood.