I do most of my shooting outdoors in all types of environments. I found that the Sandmarc lenses are manufactured to a highly finished tolerance. Very solid feeling while adding negligable weight to camera. I use my Phantom for landscape as well as customers boat surveys. It's important that neutral filters be neutral, Sandmarc is precisely that. Colorshift is almost non-existant and the ability to slow shutter speed gives impressive results. The only thing that could be improved is depth of lenses. If you use the stock camera travel lock, the lenses are .78mm deeper than stock Phantom 4 lens and will not allow stock camera lock to fit. But just install lens when needed and this is a minimal issue. Polar Pro has competition, and at 2/3 the price, Sandmarc hits well above the price point!!
Was excited to test out a new ND set for my Phantom 4 Pro. Until now we're forced to buy from DJI or PolarPro. The Sandmarc filters are fantastic. True neutral ND's with no unwanted color shift to the image to correct in post. Quality optics and coatings for a clean unobstructed imaging. Competitively priced to boot. Love these.
I bought these filter.... At first I wasn't very confident with my purchase but after trying them i was speechless! Good Product!