This 3-stop, 100 x 150mm K&F Concept X-PRO Square Soft-Edge ND Filter 100x150mm 3-Stopfrom K&F Concept X-PRO Square Soft-Edge ND Filter 100x150mm 3-Stopis made for the X-Pro Square Filter Holder System. This soft edge graduated filter allows a selective area of density to be added to an image, making it an essential tool for enhancing landscape images. This filter's soft edge allows the area above an uneven horizon line, like a city or wooded area, to be darkened by three stops to make the sky more pronounced.

Made of high-quality optical glass, this 100 x 150mm, 2mm thick filter features 28 layers of multicoating for optimal light transmission without adding any color cast. The coating also protects the filter from water, oil, minor scratches, and abrasions. It features a protective frame with large tabs that make it easy to install and remove from the X-Pro filter holder system.

0.9 Optical Density    28-Layer Multicoating    2mm Thick Optical Glass Construction    Moisture-Resistant Coating    Scratch-Resistant Coating    Reduce Exposure in Selective Areas    Allows Long Shutter Speed, Wide Aperture    Leather Case

• Fits the K&F Concept X-PRO Filter Holder System
• Plastic filter frame has a tab for easy handling
• High-quality AGC optical glass
• Nano-filter multi-coating reduces lens flare and ghosting for high light transmittance with no color cast
• 28-layer coating is scratch resistant, waterproof, oilproof, dustproof, and suitable for harsh environments and locations

Related Questions and Answers

Q: 1. Can someone explain the markings on the filter? Thanks

A: The markings are 1/2 stop increments. This helps you determine the proper exposure.

Q: 2. 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: 3. I have a 32-64mm Fuji GFX zoom lens on a GFX 50R. Can this filter be used at full wide angle without vignetting with this lens? Thanks.

A: The B+W 77mm XS-Pro Digital ND Vario MRC-Nano Filter will not vignette the Fuji 32-64mm lens. This is because the front of the filter is 82mm. By having a larger front than the mount, it reduces the risk of vignetting on wide angle lenses.

Q: 4. Does it have positive stops, detents, at each of the stops?

A: The K&F Concept Variable Fader ND2-ND400 Filter (62mm) doesn't have detents; it has markings for the stops on the edge of the filter.

Q: 5. Are the filters glass? or acrylic/plastic?

A: The filters on the K&F Concept Variable Fader ND2-ND400 Filter are made of glass.

Q: 6. What size lens cap fits this?

A: Unfortunately, the K&F Concept Variable Fader ND2-ND400 Filter (72mm) does not have front filter threads and is not designed for use with threaded lens caps.

Q: 7. 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: 8. Will the 77 and 82mm caps fit the Monofotto Xume magnetic filter adapter sets with the filter installed and not?

A: The K&F Concept Soft Silicone Cap for Variable ND Filters is designed to fit over the filter and lens with the corresponding size.

Q: 9. Are they hard stops?

A: Yes the stops are hard on the K&F Concept Variable Fader ND2-ND400 Filter. You can feel the filter pause as you rotate it past each mark so you know how many stops you are blocking.

Q: 10. 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.