This 4-stop, 100 x 150mm K&F Concept X-PRO Square Reverse ND Filter 4-Stopfrom K&F Concept X-PRO Square Reverse ND Filter 4-Stopis made for the X-Pro Square Filter Holder System. This reverse 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 reversed soft edge tapers off to darken the selective area of the image by four stops, and it is well suited to darkening sunrises and sunsets for more saturated, impactful images.

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.

1.2 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. The description says that this filter features a thin, oversized mount which helps to reduce the likelihood to vignetting when used with wide-angle lenses. To use this filter with a smaller diameter lens, what step down ring size would I have to use to be able to use it on a smaller lens diameter - - 77mm or 82 mm to hold this filter?

A: The size step-up ring that would be required for use on your lens would depend on the filter size of your lens. Unfortunately, you did not list the lens you own or its filter size. As the B+W 77mm XS-Pro Digital ND Vario MRC nano Filter has 77mm rear filter threads, you would need a step-up ring that has 77mm front filter threads. If you need assistance with locating the proper ring for your equipment, you would have to send an e-mail to askbh@bandh.com with the above information and we will assist you with your inquiry.

Q: 2. 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: 3. Does this filter vignette with a Canon 10-22 lens at 10mm on crop sensor camera?

A: A super-wide such as this lens will inherently vignette. The filter is a high level of quality and does not add any noticeable distortion to photos.

Q: 4. What size lens cap fits this?

A: A 69 or 70mm push on cap should fit.

Q: 5. Is it best to put this VND on before or after a mist filter?

A: It generally does not matter if you put the K&F Concept Variable Fader ND2-ND400 Filter (82mm) on before or after a mist filter, it can come down to preference.

Q: 6. is the 67mm version front threaded? what's the size? want to fit my lens cap

A: It is front threaded. The front thread is 72 mm. The front thread is written under the Specs tab in the section that says Front Accessory Thread.

Q: 7. 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.

Q: 8. How much does the 46mm ND filter weigh? Is it safe to use on the Inspire X5?

A: I used it for years on the X5 and now all the time on my X7 lenses. Very well made!

Q: 9. What type of lens cap to use for the B+W 82mm XS-Pro Digital ND Vario MRC nano Filter ?

A: I am using the Slip-over cover which came with the Filter, however it is very annoying, since it falls off all the time. Please let me know if there is a suitable cover, which is held secure.

Q: 10. Hi,I was wondering 2 things about this filter:* does it have hard stops ?* what is the size of the front filter ? is it 62mm ? thanks

A: This B+W 62mm XS-Pro Digital ND Vario MRC nano Filter has hard stops from +1 to +5 stops. The front thread size on this filter is 67mm; in order to avoid vignetting, the front filter thread is oversized.