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Youâll see more of the world. iD Single Vision lenses are the first to integrate your lens design on both the front and back surfaces, so you can see more clearly in all directions. Traditionally made single vision lenses have a constant curvature across the front surface, which makes peripheral vision almost impossible.
Single Lense Reflex, meaning there is a single lens through which the light from the image you are going to capture enters the camera. When setting up the shot, and viewing it with a standard (35mm) SLR camera, the light is reflected by a mirror to the objective lens, where you view what the camera sees. D-SLR camera (Digital-SLR) generally lacks a realtime LCD preview, since the mirror is in the way, although newer DSLR cameras do offer the ability to offer the traditional preview like a standard digital.