D7100 Buffer

Exposure can be a moving target.  Most notably for me, the reflections from fish change every frame, and blown highlights are certainly likely, esp if I can't take advantage of the RAW headroom.

As I said, in the old days, they shot a high percentage of loser shots, just as now.  A underwater photography was happy to get 2 or 3 good shots from an entire roll/dive.

You're subjecting yourself to an artificial limitation over $20 or $30 in parts cost.