A quandary? Digital allows you to shoot multiple images of the same subject. Memory is limitless; batteries are rechargeable; you can experiment and not hoard resources. Frequently I may shoot more than a hundred images in a dive. I shot way more than that before. But lately I ask the question, “Is this a photograph?” Then I stop and don’t shoot a fish tail swimming away from my lens. A lot has to do with taste. But even so the same settings can give different results.
Therein lies the decision to keep one or the other. Can you imagine discarding images? Some do so ruthlessly. They discard all images in a first pass. I hoard. No discards. Hey, it’s ok. Memory prices are inexpensive. The bottom line – this guy waited around for me to take two images. The actual situation is that he circled and came back to the same position. This made me shoot twice and I was surprised that difference I got.