Use the Polaroid Zoom/Focus Assist Handle to make focal length adjustments or focus changes on-the-fly. Simply wrap and secure the adjustable strap around your lens' focus or zoom ring. Then, rotate the handle to adjust your setting. The handle serves to increase the torque applied to the adjusting ring, thereby decreasing the amount of pressure your fingers need apply. You might want to try using two Zoom-Focus/Assists, one for zooming and one for focusing. Either way, you'll be able to make adjustments without interrupting your attention from the viewfinder or display panel.