When and Why to use Variable ND Filters
![](https://www.mkeproductionrental.com/wp-content/uploads/2013/10/f-1-8-med-nd.jpg)
We created a test of the 77mm Promaster Variable ND filter on a Zeiss 50mm Planar T* f, to help demonstrate the impact the filter can have on the image, as well as test for any color shifting, fringing, or “x-darkening”…