The roof prism construction allows the image to be seen the right way round. Canon 22 mm adapter for: Canon EOS3/30/33, 50D/50E/55. Canon 18 mm adapter for Canon 10D, 20D, D30/D60, 300D, 350D, Digital Rebel , EOS10, 66, 88/88QD, 100, 300/300V, 500/500N, 700/750, 850/888, 1000N/1000FN, 1/1N/1D/1V.
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