64 in slot 1 (NEF) 16 or 32 in slot 2 (JPG) Lasts as long as 1 battery. Shoots well over 1000 photos. When coming towards the end of 1 of them, change all 3. Always start a shoot (horse shows mainly) with empty, reformated (in camera) cards and freshly charged battery. Have been known to shoot up to 2000 pics in a day so do have to change.
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