Opteka CXS-1000 Portable stabilizer for digital cameras, SLR Camera & Video Camera (Replaces a three-legged 177 cm / one-legged tripod) (Electronics)
If you do not want to walk with tripod through the area but keep the camera very quiet needs - eg. in the museum, where tripods are prohibited - then brings a vertical fixation with practice already a bit further. Problem: when you pull right in this