For Glare Free LCD screen viewing Checking your histogram, composition and focus outdoors is easy with Hoodman's HoodLoupe. HoodLoupe 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. HoodLoupe adjusts focus just like a binocular eye piece... you turn the eye piece in or out to set for your vision. HoodLoupe's precise German glass optics give you a 1 to 1 ratio for true LCD screen viewing. Each HoodLoupe 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.