Canon’s Full-Frame mirrorless camera is rumored to be announced in Q3 2017. According to the latest rumors from CR2, Canon design team is making good use of EF mount lenses instead of developing new lenses.
Canonrumors also said that there might be a fixed lens full frame mirrorless camera coming first before we see an ILC full frame mirrorless camera. It is now in development.
Source: CR2
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