Varizoom VZ-STEALTH-DVX (VZStealthDVX, VZ Stealth DVX, VZ/Stealth/DVX, vz-stealth-dvx) Miniature Joystick Zoom Control for Panasonic Cameras w/ 2.5m66m "Zoom" Jack
The VZ-StealthDVX features a unique variable speed zoom thumb control allows user to maintain the slowest crawl or gradually ramp up speed and then decrease speed gradually all in one smooth motion! Because your thumb never leaves the speed control you have quick response time and smooth actions to zoom in, zoom out, zoom faster or zoom slower.
Simply push forward to zoom in (telephoto) and pull back to zoom out (wide). No shaking the camera or time lost fumbling to find the right button to zoom in or zoom out.