100% compatible for Canon EOS 10D EOS 20D EOS 30D EOS 40D EOS 50D EOS 5D EOS 5D Mark II EOS 60D EOS 6D EOS 70D EOS 80D. Canon EOS 40D, EOS 5D, EOS 5D Mark II. They also play an important role inpreventing any stray light from entering the viewfinder whilst you’re looking down it.
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