It also greatly enhances focusing accuracy.. Magnifying the viewfinder image helps obtain accurate focus with ease. It is improved based on previous series, and come with bigger lens which can better solve the vignette. You need not worry about the broghtness of the viewfinder's image being affected after installation, as this magnifier does not affect the brightness of the viewfinder's image at all. This magnifier does not create vignetting affect. This Viewfinder Magnifier adjusts the viewfinder's image by a ratio of 1.08x-1.60x and makes the viewfinder's image larger
