The Apex Mini Bean Bag - Realtree APG from LensCoat is a versatile, solid support for a camera, especially one mounted on a gimbal or ball head. Designed for DSLR cameras with lenses smaller than 500mm, the Mini Bean Bag has a U-shape that makes it perfect for mounting on any narrow or round surface, such as a fence, a car door, or a tree branch. Inside the "U" is a high-tack surface that keeps it from slipping.
The Mini Bean Bag features an easily accessible fill zipper that allows you to customize the amount of filling that's inside the bag. A weather-resistant flap protects the zipper. At 5.5 lb it's less than half the size of its bigger sibling, the Apex Bean Bag, yet it's still heavy enough to provide plenty of stability.
Inside the bag there's not only filling but an aircraft-grade aluminum plate that, with its 1/2"-long 3/8"-16 screw, supports the attachment of a head. (Each plate is hand-made in the U.S. with the help of a 100,000 lb press.) The plate is removable, so you can use the Mini Bean Bag as a traditional, soft bean bag support.
You can also invert the Mini Bean Bag to nestle a telephoto lens into the "U" portion, which provides non-slip support. This is perfect for shooting from a flat surface such as a car hood or the ground.