You may find you need to balance your shutter speed a little here, depending on the conditions.
You may find you need to balance your shutter speed a little here, depending on the conditions. A 20-second exposure will capture the reflection of the stars, but you may pick up movement on the water that reduces the clarity. Try shorter exposures for your reflection shot – but it might mean you have to work harder to bring out the stars in the edit. Lightroom's linear-gradient edits are perfect for bringing out the clarity and sharpness of reflections, so give that a go.