Best neutral density filters | Space

Do you need one of the best neutral density filters? If you’re experimenting with long exposure photography then the answer is probably yes. Little more than dark glass, neutral density filters (aka ND filters) are designed to control light. They purposefully reduce the amount of light that reaches your camera lens and, therefore, your camera’s … Read more

Adsorbent material filters toxic chromium, arsenic from water supplies

Researchers at Oak Ridge National Laboratory designed an adsorbent material to rapidly remove toxic chromium and arsenic simultaneously from water resources. Credit: Adam Malin/ORNL, US Dept. of Energy Researchers at the Department of Energy’s Oak Ridge National Laboratory are tackling a global water challenge with a unique material designed to target not one, but two … Read more