radarbrat

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So you already know that you can use your sunglasses as a handy filter for photos, but have you ever considered welding glass?

The thick substance is used to shield welders from the bright sparks, but it can also be used as a camera filter is situations with lots of light. 

Inexpensive Welding Glass Used as a Lens Filter

Photos by Stephen Ozga (top) and Radarbrat / via Reddit