Winrase&reg; V1(43) 2.8X DSLR Camera LCD Screen Magnifier Viewfinder Eyecup Hood Extender for Canon 5D2 50D 500D 7D 450D 40D,Nikon D7000 D90 D300 D700 D800 D3X Magnification: 2.8X,Internal dimensions of the frame:63X47mm Universal magnetic mounting interface allows rapid Mounting and remove without any wear and tear,It will not affect the installation and use of other accessories. Dynamic viewing (video capture) is more stable, more convenient, more accurate, will quickly upgrade your digital camera into a portable video camera,In bright outdoor sunlight LCD screen can also be observed more clearly. For Canon 5D2, 7D, 500D 450D, 40D, 50D.Nikon D7000, D90 D300, D700, D800, D3, D3X,and fits most 3.0 "LCD displays(Screen Aspect Ratio 4:3).