... as an AF assist beam (with ... The LED light can provide up to 3.5 hours of illumination with four fully-charged AA batteries. ... 4 . Select [External flash func. ... * Cameras with External Flash Menu: EOS 40D-60D, Rebel XS/XSi, T 1i, T 2i, T 3, T 3i, EOS 7D, 5D Mark II, EOS-1D Mark III / Mark IV , EOS-1Ds Mark III Wireless E -TTL Flash Operation
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