What is an ND filter and why did we use one?

An ND filter was used for certain parts of the filming for our video due to its benefits of being able to block out large amounts of light going into the lens. A small definition of an ND filter:

"neutral-density filter, or ND filter, is a filter that reduces or modifies the intensity of all wavelengths, or colors, of light equally, giving no changes in hue of color rendition." - Wikipedia

The main reason an ND filter was used was because it allowed me to keep the aperture of the lens at f1.8 (This gives us a very good DOF) which adds a nice look to the video and in my opinion makes the video look better visually.



The second reason is because it allowed me to keep a constant shutter speed of 50, this is very important as this is the shutter speed used on the large marjority of videos and films as it is as close as you can get to the "shutter speed" of the eye. 



An example of a what an ND filter can do and what it looks like: