According to the latest rumors from CR1, Canon EOS 5D Mark IV will come after the EOS-1D X Mark II announcement and start shipping from Q1 of 2016.
Canon EOS 5D Mark IV Rumored Specs:
- start shipping in Q1 of 2016
- 18mp to 28mp Full Frame CMOS
- 61 AF Points (all crosstype)
- 12fps
- Dual CFast
- 4K Video
- New DIGIC processor
Source: CR1
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