Sandbag

A sandbag or dirtbag is a bag or sack made of hessian (burlap), polypropylene or other sturdy materials that is filled with sand or soil and used for such purposes as flood control, military fortification in trenches and bunkers, shielding glass windows in war zones, ballast, counterweight, and in other applications requiring mobile fortification, such as adding improvised additional protection to armored vehicles or tanks.

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Source: Wikipedia · Image: Wikimedia Commons · Public domain

TRIPODIQ

Steady shots start here — tripods, gimbals, and camera-support know-how.

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