Complex sentence: However, this activity can lead to lost shots, especially in fast-paced action scenarios, as the photographer is looking at the last shot rather than looking at the scene unfolding in front of them.
Split into simpler sentences: However, this activity can lead to missed photo opportunities, especially in fast-paced action scenarios. This is because the photographer will be occupied looking at the previous shot rather than actively photographing the scene unfolding in front of them.