This 4-stop FotodioX ND Filter features a filter ring with 145mm front filter threads. With a 16x filter factor that provides a 4-stop exposure reduction. Its 1.2 optical density creates a darkening of the entire image, allowing you to photograph with a wider aperture or slower shutter speed than normally required. By slowing your exposure time or increasing your aperture, you are able to control depth of field and convey movement more easily. Neutral density filters do not affect the coloration of the image and are ideal for pairing with other filters.

To prevent internal ghosting and reflections, this filter includes multiple layers of anti-reflection coating. These coatings also offer greater protection to the filter substrate and help it to stay clean for longer than with uncoated filters. This filter is constructed from optical glass for clarity as well as color fidelity and features an aluminum-alloy filter ring for durability while remaining lightweight.

For Sigma 20mm f/1.4 DG HSM Art    WonderPana 145 Core Unit    145mm Solid Neutral Density 1.2 Filter    16x Filter Factor, 4-Stop    Darkens Entire Image    145mm Solid Neutral Density 1.5 Filter    32x Filter Factor, 5-Stop    Darkens Entire Image    145mm Center-Pinch Snap-On Lens Cap    Use with WonderPana 6.6" Holder Bracket

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

Providing a 4-stop exposure reduction, this filter allows you to control depth of field and convey movement more easily.

Filter does not affect coloration of the image and is ideal for use with other filters.

Includes multiple layers of anti-reflection coating to prevent internal ghosting and reflections.

Constructed optical glass for clarity and color fidelity.

145mm front filter threads allow for use with other filters.

Durable, lightweight aluminum-alloy filter ring with one brass side knob allows the filter to be easily screwed on or off.

Filter pouch included for storage and transport.

Related Questions and Answers

Q: 1. Will this work with a Nikon D3400 Body?

A: The Sigma 20mm f/1.4 DG HSM Art Lens for Nikon F BH #SI2014N • MFR #412955 will work with the D3400 yes.

Q: 2. Will this lens work on a Canon 6ti?

A: If you mean Canon T6i then yes. However you should keep in mind that this lens was designed for full frame cameras and the T6i is has a cropped sensor so instead of 20mm that you would get with a full frame camera like a Canon 5D you are effectively getting 32mm.You can calculate the true focal length you would get by multiplying the lens' 20mm by 1.6 which your camera's crop factor.

Q: 3. I am looking close at this lens because of the fast aperture. I shoot exclusively at night and wondering if anyone knows if this lens has coma?

A: Every lens has coma/ comatic aberration.DXOMARK rates it at this link and you can compare it with other lenses. But as lenses go it is a very good lens for low coma compared to other lenses, http://bit.ly/2ay1IWA.

Q: 4. Does this lens fit a Sony cx 6000

A: Yes, this lens will work with a Sony A6000.

Q: 5. All the pictures are the same. Aony or. Anon or Nikon. Did anyone have all the cameras, Sony, Canon, Nikon and took the same pictures with each camera ?

A: The Sigma 20mm f/1.4 DG HSM Art Lens for Nikon F is also available in the Canon EF, Sigma SA, and Sony FE lens mounts. The lenses are all identical except for the lens mount. As the lenses are all on the same page on our website, the images of the lens would look identical for all camera mounts (except for the image of the mount itself), and the images captured by customers are not able to be separated by the camera mount used to capture the image. The image quality for all mounts would be similar in performance.

Q: 6. Does it have linear acceleration response MF?

A: Yes, Sigma 20mm f/1.4 DG DN Art Lens for Sony E has the same linear accelatation when the lens is set to manual focus.

Q: 7. with the 1.4 aperture will a shutter speed of 1/8000 be fast enough to shoot outdoors in sunlight without being blown out... seeing as how you cant attach any filters to it?

A: You don't mention an ISO setting, but based on the sunny 16 rule (shutter speed = the inverse of the ISO setting at f/16 for a typical sunlit scene), an ISO speed seven stops slower than 8000, or about 64, would yield the nominally correct exposure at your specified settings of f/1.4 and 1/8000 second. Do you really need the lens wide open? Otherwise you could also stop down (this lens goes to f/16).

Q: 8. Is it likely for an 82mm Variable ND to vignette on this lens?

A: As long as you do not have an overly thick 82mm Variable ND, it should not vignette on the Sigma 20mm f/1.4 DG DN Art Lens for Sony E.

Q: 9. Does this fit a cx 6000 mirror less

A: Yes, the Sigma 20mm f/1.4 DG HSM Art Lens for Sony E does fit the Sony A6000 mirrorless camera.

Q: 10. Do you have the metal lens cap in stock?

A: No. We only offer the plastic lens cap at tis time and it is a special order item. It is shown here.