Hoodman H-LPP3 HoodLoupe 3.0 Professional is worn around your neck just like a normal loupe. When it is time to review your shot; bring Hoodloupe up to your image and place your eye up to the eye cup for complete glare free viewing. Hoodloupe has a +-3 diopter to accommodate those with less than perfect vision. This LCD loupe adjusts focus just like a binocular eye piece... you turn the eye piece in or out to set for your vision. Minimal magnification is used to eliminate visual pixilation of your image. Each Hoodloupetm is encased in a user friendly rubber for comfort and protection from bumps that will occur throughout your shoot. Comfortable lanyard and compact protective storage case included. Fits up to 3.0 inch LCD screens.