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This product has a FreakScore of 7.3 out of 10 based on 89 scores.
The EF 2x II doubles the focal length of any lens it's mounted to, and reduces its effective aperture by two stops. The effective aperture of the lens is increased by one or two stops respectively. Autofocusing does not operate if the effective maximum aperture is greater than f/5.6 (greater than f/8 on the EOS 1V and EOS 3).
Dust and moisture resistant construction
Extends the master lens focal length by 2.0x
Minimum loss of lens performance
Reduces inner ref…