Canon Focusing Screen Eg-D Grid Precision Matte

For the Canon EOS 5D MkII digital SLR camera, the Eg-D Focusing Screen (Grid Precision Matte) maximises viewfinder brightness and is optimised for use with f/5.6 and slower lenses. It provides a 3-line (horizontal) by 6-line (vertical) grid for easier composition and horizon alignment.

Price: £ 33.99 from Wex Photo Video