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A ‘nanofiber’ mask fabric manufactured in Oklahoma filters 9 times more tiny, potentially-dangerous particles than a bandana, independent tests show. Here’s how you can buy it

One of the designers that discovered that blue shop towels were more effective at filtering tiny particles than a bandana worked with a particle testing company to officially test 20 materials. They tested a variety of things people were using to create homemade masks, from paper towels to vacuum cleaner bags. A material sold by […]

Photography

Sigma 20mm F1.4 Art review: More than a landscape lens

Sigma 20mm F1.4 Art review: More than a landscape lens “Not everyone loves wide-angle lenses, but Sigma’s 20mm Art made me a fan.” Rare focal length/aperture combination Impressively sharp at f/1.4 Professional build quality Great price Severe vignetting No filter support MSRP $ 899.00 Wide-angle lenses don’t get enough credit for their versatility. If you […]