It is a filter designed for videos and to give a "vintage" touch to the final result. In short: wonderful result also for photography. This is a useful filter for reportage or portrait or landscape narration. You don't lose sharpness and you get much less "pulled" light that also expands in the shadowed area. It is a filter to be used in photography with large apertures and which "tells" an atmosphere. Technical review: It has no dominant details, so it leaves the colors similar to the photo taken without filter. Great ! It doesn't make light, you don't need to increase the Iso when you mount it. Great ! The sharpness in the details (and here is the beauty) remains almost unchanged. You don't lose sharpness in focus areas although I wouldn't use it in ultrafine landscape photography but for a storybook, outdoors or portrait together absolutely you. Autofocus is not affected by the filter, at least not on the Nikon D750 with fixed lenses. Use/Effect: This is a filter that gives a glowing effect to photos, especially special for videos and hard-light or backlit portraits. The reflections are lowered but without becoming dull, moreover the light "penetrates" into the shadows, giving a very soft "glow" effect. Ideal for portraiture or to give a more dreamy atmosphere, eliminates image clarity in high contrast areas. In the photos you can see some comparisons without filter / with filter, two portrait photos together and what comes to you. Bottom Line: This is a filter you don't think you could fit into your kit, but when it comes in, it has such a distinctive result that you try it in any situation. Absolutely to try!