The Tiffen 4K diffusion test film is an enlightening insight into all of Tiffen's current diffusion filter offerings.
This test film highlights the various styles of diffusion by indexing them into main categories; Black Halation, White Halation, Optical Resolution etc. Then each category is sub dived into it's industry filter brand name.
*Video shown on Vimeo at 1080P
View the full film in 4K at the Tiffen counter at NAB 2014