Just like with anamorphic attachment lenses, this filter will work best on 50mm, 85mm, 100mm, 135mm lenses with aperture speeds in the f0.95 to f2.8 range. // It does not stretch the actual image, it only morphs the bokeh and the areas out of focus for that beautiful waterfall anamorphic effect. You can then crop or add letterbox bars to any ratio of your choosing. // This is a 58mm sized filter. If the front of your lens has a size other than 58mm please consider using basic step-up or step-down rings available for a few dollars in most camera shops or online. // We also have a 77mm version, but this is meant for larger front lenses that are 85mm, 100mm, 135mm, or 200mm focal lengths (not with crop factor). // The Neutral colored Flare/Streak filament takes on the color temperature of the most dominant and or direct light source. // We also have available Blue Flares/Streaks and Bokeh Only (no Flares or Streaks) versions available.