Polarized Film Sheets 3 PCS 7.8 x11.8inches/20x30cm Polarizer Linear Polarizing Filter Non-Adhesive for Educational Physics Photography Lighting

I'm doing some photography lighting experiments with polarized light and needed these to polarized the light from my studio strobe and continuous lights. A polarizing lens will be used on the camera and it's adjustment should help me eliminate unwanted reflected light bouncing off shiny objects on my subjects. I'm setting up for this now.

Great for light lab.

Does exactly what it is supposed to. The protective "Saran Wrap" on both sides can be easily removed by using a piece of duct tape to start a corner. When you remove that from both sides, the polarizing sheet is then nice and clear and ready to use. Otherwise it is diffused. Lots of customers fail to realize this.

This film does exactly what it should. Both sides are non adhesive which seems to be getting harder to find now. The only reason I gave it 4 stars instead of 5 is because even though it was shipped in a bubbled envelope, when it arrived all the sheets had small creases in them. I use them for photography so the creased part is unusable for me, but I also didn't need a sheet this large. Thankfully I could cut it down past the crease and they were still large enough to use. But they should put a little piece of cardboard or something in the package to keep this from happening.

I needed some reasonable linear polarizers to measure glare from LED headlamps. These work perfectly. I can use them with an SLR and light meter. I have to make a frame but that is simple. The 90 degree blockage is great for this price point. Remember to remove plastic covers.

This arrived in good condition, despite being shipped in only a bubble envelope. Has good extinction. BUT, and this is a big BUT, it curls up like a spring, forming a cylinder about 3 inches in diameter. Could not flatten it by weighting it down flat for a long period or by weighting it with heat for a long period. If you want this flat you will need to stick it to a rigid support.

I'm using mine to polarize the light so I can take pictures without those bright spots, specially on metalic surfaces.Works as intended.

The media could not be loaded. There was enough to make my own filters for the camera. Good value. Did not realize it was covered with protective plastic. Found out. Still have enough for other projects.