There was much rejoicing last week when both Sigma and Tamron announced their first ever Canon RF lenses, following an unspoken five-year embargo on third parties launching autofocus lenses for Canon's mirrorless camera system.
However, last week's lenses from Sigma and wide-angle Tamron lens were strictly APS-C (and non-stabilized) – and Canon says that it "can't answer" whether or not third parties are allowed to release full frame lenses for the RF mount.
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