The 1Dx Mark II had two card slots β one for CF memory cards and one for CFast cards. Both card formats have been abandoned in the 1Dx Mark III. It still has two card slots but these take high-speed, high capacity CFexpress cards. The new cards also handle the massive data generated by the 1Dx Mark III in 5.5K RAW video recording mode.
User's Guide Recommendations Canon 1DX Mark III (50.5 oz./1,433g with battery and one card, has two CFexpress type B slots (won't work with SD, SDHD, UHS, CF, CFast or XQD cards), $6,499 new or about $5,500 used if you know How to Win at eBay) and Canon EF 50mm f/1L USM. bigger.
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