Why on earth would anyone want the EF-S lenses to be mountable on full frame cameras? They are cheap and nasty! I dare say, anyone who owns a 5D Mark III knows what they're doing and would be purchasing L-series glass and not EF-S garbage.
There's also no such thing as the DX/FX paradigm in the Canon world. Except for the EF-S lenses, ALL EF lenses work on Canon systems.
Who beat who, again? No-one.
H
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