Focusing Screen Eg-S
The Canon Eg-S Super Precision Matte Focusing Screen is an interchangeable focusing screen compatible with the Canon EOS 5D-Mark II camera. The Super Precision Matte screen improves the ease of focusing when doing manual focus, but is not recommended for use with lenses slower than f/2.8. With these slower lenses, the viewfinder will actually look darker than with the standard Eg-A screen.
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