This zoom viewfinder magnifier is designed for DSLR photography. It offers a magnification range of 1.08x to 1.60x, helping photographers who wear glasses or have aging eyesight achieve better focus accuracy. Features: - Improved design with a larger lens to reduce vignetting - Adjustable magnification from 1.08x to 1.60x for a larger viewfinder image - Enhances focusing precision without affecting viewfinder brightness - Does not cause vignetting when properly installed How to use: 1. Remove the viewfinder eyecup 2. Attach the adapter to the camera’s viewfinder 3. Screw the magnifier onto the adapter securely Compatibility: - Canon: D30, 40D, 60D, 300D, 350D, 400D, 450D, 500D, 550D, 1000D, 10D, 20D, 30D, 5D, 5D Mark II, 7D, EOS-1 - Nikon: D40, D50, D70, D70S, D80, D90, D100, D200, D300, D500, D700, D800, D3000, D5000, D1H, D1X, D2H, D2X, FA, F6, F75, F80, F801S, F90, F100 - Pentax: K-m, K7, Kx, K10D, K100D, K20D, K200D, *ist DL2, *ist DL, *ist DS, *ist D - : A100, A200, A350, A450, A500, A550, A700, A900 - Olympus: E-300, E330, E410, E500, E510 - Fujifilm: S2 Pro, S3 Pro, S5 Pro - : GX10, GX20 - Sigma: SD10, SD14 - Minolta: Maxxum 7D, 5D, x-700 Package Dimensions: 10 x 10 x 3.5 cm (3.94 x 3.94 x 1.38 in) Package Weight: 72 g (2.54 oz) Package Contents: 1 x 1.08x–1.60x Zoom Viewfinder Eyepiece