This 1.51X viewfinder magnifier is designed for DSLR photographers. It provides added convenience and clarity for those who wear glasses when viewing scenes. Features 1.51X magnification, making it easier to compose shots and achieve accurate focus. Suitable for individuals with mild vision correction needs (within 5.00 diopters), allowing clear viewing without glasses. Constructed with high-quality optical glass that resists fogging; installation does not cause vignetting or reduce brightness. Stands 15mm away from the camera after installation, providing comfortable eye relief and protecting the camera screen. Includes six interchangeable mounting bases for compatibility with various DSLR camera models. Specifications: Magnification: 1.51X Item Size: 3.5 x 3.2 x 2.2cm / 1.4 x 1.3 x 0.9in Item Weight: 20g / 0.7oz (with covers) Package Size: 10.3 x 10.1 x 3.6cm / 4.1 x 4.0 x 1.4in Package Weight: 83g / 2.9oz Compatibility: Six mounting bases included for broad DSLR compatibility: - "N" base: Fits Nikon full-frame and APS-C DSLR cameras - "C-EF" base: Fits Canon APS-C DSLR cameras - "C-1D/5D3/7D" base: Fits Canon full-frame DSLR cameras - "P" base: Fits Pentax and Samsung DSLR cameras - "F" base: Fits select Fujifilm, Kodak, Sigma, Leica R, and Olympus cameras - "S/K" base: Fits Sony and Minolta cameras Package List: 1 x 1.5X Zoom Viewfinder Eyepiece with Covers 2 x Eyepatch 6 x Viewfinder Mount Base Note: Camera not included.