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The World's best variable ND filters,  the Aurora PowerXND-II 128 covers 1 to 7 stops and PowerXND-II 2000 covers 5 up to 11 stops.
The World's best variable ND filters, the Aurora PowerXND-II 128 covers 1 to 7 stops and PowerXND-II 2000 covers 5 up to 11 stops.
526 backers pledged $75,186 to help bring this project to life.
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PowerXND Mark II - The Best Variable ND Filters 1 - 11 Stops



What is a prototype?

A prototype is a preliminary model of something. Projects that offer physical products need to show backers documentation of a working prototype. This gallery features photos, videos, and other visual documentation that will give backers a sense of what’s been accomplished so far and what’s left to do. Though the development process can vary for each project, these are the stages we typically see:

Proof of Concept

Explorations that test ideas and functionality.

Functional Prototype

Demonstrates the functionality of the final product, but looks different.

Appearance Prototype

Looks like the final product, but is not functional.

Design Prototype

Appearance and function match the final product, but is made with different manufacturing methods.

Production Prototype

Appearance, function, and manufacturing methods match the final product.

Project supporting material callout image

Prototype Gallery

These photos and videos provide a detailed look at this project’s development.

Featured video in 4k

Introducing Aurora PowerXND™ Mark II

The best variable neutral density filters in the class.

PowerXND-II Family
PowerXND-II Family

With unparalleled light reduction capability and image quality, the Aurora PowerXND™ Mark II family of filters can be used in a wide variety of photographic applications as well as in videographic applications. The Mark II filter family takes the original PowerXND™ 2000 filters to the next level: Incorporating advancements developed from our core filter technologies.

Seamless Full Coverage

1 to 11 Stops

Full coverage of 1 to 11 stops
Full coverage of 1 to 11 stops

With the Mark II family we’ve introduced two variable ND filters to cover the full range of 1 to 11 stops light reduction capability.

The PowerXND-II 128 is a 1-7 stop variable ND filter while the PowerXND-II 2000 is a 5-11 stop variable ND filter. With both filters users can control light reduction from 1 to 11 stops, making them highly versatile tools for general photography and videography applications.

PowerXND-II 128 covers 1 to 7 stops
PowerXND-II 128 covers 1 to 7 stops
PowerXND-II 2000 covers 5 to 11 stops
PowerXND-II 2000 covers 5 to 11 stops


Usability Features

Designed in California by Aurora Aperture, the PowerXND™ Mark II filters incorporate several new features in usability improvements.

A direct reading scale correlates to light reduction capability so users can quickly dial-in the filter to the desired value.

Built-in hard stop and assist lever
Built-in hard stop and assist lever

A hard stop was added to limit the filter rotation within the operating range, a highly demanded feature after the release of the original PowerXND™ 2000. For videographers this will mean that the filter will prevent overshooting the minimum and maximum settings.

In addition a detachable lever for the 52mm and larger sizes of the PowerXND-II family is a standard feature that can be optionally used to assist in turning the filter. Again, another useful feature for videography users.

Assist lever can be removed or replaced
Assist lever can be removed or replaced

We’ve made the knurling of the rotating ring more aggressive and added knurling to the fixed ring to improve grip when attaching and detaching the filter.

Same thin profile of new (left) and original (right) filters
Same thin profile of new (left) and original (right) filters

Despite these newly added physical features, the PowerXND-II filter family still maintains a slim profile to minimize vignetting on wide angle lenses. With a depth of only 6.0mm it is the thinnest among commercially available variable ND filters*.

The PowerXND™ family features an equally sized front thread which allows the original lens cap to be used or to stack additional filters. Many other brands of variable ND filters either have a larger sized front filter thread or no front thread at all.

* As of June 2018

Optical Quality

6 elements and 2 groups

The PowerXND-II filter consists of two groups of optical glass and a thin film element. Using a proprietary bonding and polishing technique, we are able to achieve optical performance close to fixed ND filters which only have a single glass element.

Schott B270® glass and high quality polarization film from Nitto Denko are used to build the PowerXND-II. Combined with a proprietary post-bonding polishing process the filters are able to meet high resolution demands of 4k/8k video and the high pixel density of modern day camera sensors. 

Multilayer nano coatings are utilized for light reduction, thus minimizing color shift. The PowerXND-II features high color accuracy on par with the benchmark of fixed ND filters such as our PowerND™ filters. 

Lastly, a PFPE based nano coating is applied to the filter surfaces, ensuring the protection of the filter surfaces against water, oil, dust and dirt. This coating allows for easier cleaning of the filter as substances do not easily adhere and are easily removed. The PFPE based nano coating has a 110 degree static contact angle, one of the best in the industry.

PFPE surface repelling coating
PFPE surface repelling coating

Some commercially available variable ND filters do not have adequate surface protection and as a consequence are difficult to clean.

Good surface protection coating (left) vs. bad or no coating (right)
Good surface protection coating (left) vs. bad or no coating (right)
4k video screen shot (click for full resolution file)
4k video screen shot (click for full resolution file)

4k video clip

Precision and Durability

Built to last

The Aurora PowerXND™ filter frames are built from aerospace grade aluminum with computer numerical control lathes (CNC) for high mechanical precision and accuracy. They are anodized black for corrosion protection. 

Various prototype frames during developement
Various prototype frames during developement

Extended temperature range lubricant is applied in the assembly process so the filter ring will have smooth and well dampened rotation handling for all weather applications.


  • PowerXND-II 128: ND 2 - 128 (1 - 7 stops)
  • PowerXND-II 2000: ND 32-2000 (5 - 11stops)
  • Slim profile of 6.0mm 
  • Schott B270® Super White glass 
  • Nitto Denso polarization film
  • Direct reading scale 
  • Dual scales for 52mm or larger 
  • Same size front thread 
  • Assist lever for 52mm or larger

Available filter thread sizes:

37mm, 39mm, 40.5mm, 43mm, 46mm, 49mm, 52mm, 55mm, 58mm, 62mm, 67mm, 72mm, 77mm, 82mm, 86mm, 95mm, 105mm, and 150mm.

Video reviews of the original PowerXND 2000


To simplify ordering we’ve placed most of the filters into three main groups, regardless of if they are either the PowerXND-II 128 or PowerXND-II 2000:

  • Large - ⌀67mm to ⌀82mm 
  • Medium - ⌀49mm to ⌀62mm 
  • Small - ⌀37mm to ⌀46mm

We also offer a bundle option which is two filters in the same size group at an additional 10% discount.

Lastly there are limited numbers of early bird specials offered at up to 60% discount. The early bird programs come with a pair of filters: one PowerXND-II 128 and one PowerXND-II 2000 of the same size group.

Multiple Rewards

If you wish to pledge multiple rewards such as more than two filters, or two filters from different size groups, you will need to first select a primary reward and then add the additional cost of other rewards to the total amount. You can either do this during the pledge or after a pledge is made by using the "Manage your pledge" tab. No additional shipping costs will be required.

Once the project funding period is over, we will send every backer a survey. In the survey you will be able to select additional reward(s) in addition to the primary reward.

Production and Timeline

The optical design of the filter is complete and the manufacturing process is mature. We do not expect any potential issues in the coating and polishing processes.

Since we have been developing the new filter frame in conjunction earlier PowerGXND filter project, the mechanical design is complete and ready for production. In fact some of the filter frames are already being produced along with our PowerGXND filters.

Press Kit

Risks and challenges

This is our fifth crowdfunding project so we have learned many lessons from experience, especially in manufacturing and shipping.

Suppliers affect our schedule the most. Sometimes it’s their own management issues and very often it is their sub-suppliers meeting the deadline. We have seen this happen quite a few times in the past and we also have noticed other crowdfunding creators facing similar challenges.

Experienced crowdfunders who have backed many projects know this well. While we do not imply that shipping delays in crowdfunding are a norm, we would like to bring this up for first time backers. We try to balance in between a quick delivery schedule by getting our project launched when it is ready while maintaining some room for managing supplier scheduling.

We will work with our suppliers to ensure meeting production schedule once the project is fully funded.

Learn about accountability on Kickstarter
Questions about this project? Check out the FAQ

Funding period

- (21 days)

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