This 1.51X viewfinder magnifier is specially designed for DSLR photographer. Make it convenient and clear for photographer who are with glasses to spot scenes. Features: 1.51X view magnification, make it easier to for you find excellent views and obtain accurate focus. Good helper for short-sighted / long sighted people (within 500 degree), enable you to see view clearly without glasses. High quality anti-fog optical glass, do not create vignetting or affect brightness after installation. 15mm height away from the camera after installation, ease your organs and keep them away from the screen. 6 magnifier mounting bases, compatible with various DSLR camera. Specifications: Magnification: 1.51X Item Size: 3.5 * 3.2 * 2.2cm / 1.4 * 1.3 * 0.9in Item Weight: 20g / 0.7oz （with covers） Package Size: 10.3 * 10.1 * 3.6cm / 4.1 * 4.0 * 1.4in Package Weight: 83g / 2.9oz Compatibility: 6 different mounting bases fit for various DSLR camera, such as "N" mounting base: Replacement for Nikon (Full-frame & APS-C) DSLR Camera and etc; "C-EF" mounting base: Replacement for Canon APS-C DSLR Camera and etc; "C-1D/5D3/7D" mounting base: Replacement for Canon Full-frame DSLR Camera and etc; "P" mounting base: Replacement for Pentax Samsung DSLR Camera and etc; "F" mounting base: Replacement for Fujifilm, Kodak, Sigma, Leika R, Olympus Camera and etc; "S/K" mounting base: Replacement for Sony, Minolta Camera and etc. Package List: 1 * 1.5X Zoom Viewfinder Eyepiece with Covers 2 * Eyepatch 6 * Viewfinder Mount Base Note: Camera is not included.