Super CINEMATIC or Super USELESS? Freewell Anamorphic Lens Flare Filters - YouTube
Amazon.com : Creator FX Fractal Light Flare Lens Filter | Light Refracting FX Filter for Camera | Special Effects Filter for Random Dazzling Light Streaks (Fits 82mm, 77mm, 72mm, 67mm) : Electronics
Moment's new CineFlare Streak filters promise anamorphic-style flares without a specialized lens: Digital Photography Review
These Variable Lens Filters Have Stunning Effects Built Right In