New Sliding Magnifier. This is a new sliding magnifier. It is handy and easy to carry. It is 2X power and has a focal distance of 5" (127 mm). The glass lens measures approximately 1 3/4" (44.5 mm) in diameter. It measures approximately 2 13/16" x 2" (71 x 51 mm) closed and 4 1/2" x 2" (114 x 51 mm) open.