First things first... what is IS & VR? IS is image stabilization in Canon lenses, and VR is vibration reduction in Nikon lenses. Some other brands also produce similar lenses, such as Sigma with OS, optical stabilizer. These functions help to reduce blur from camera shake. When using this function, you can acheive sharper images when hand holding your camera and shooting at slower speeds. Since it's not always possbile to use a tripod, this function comes in handy in many situations including lower light settings, such as shooting indoors, or when trying to capture something that is moving, such... Read more
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