This is the same sunflower field but shot as a vertical. Two images composited together one for the milky way and another for the sunflowers. Sunflowers lit with a Yongunuo speed lite.
Image adjustments in Lightroom and Photoshop. Camera on sticks triggered with a remote.
Canon 5D MarkIII
Sigma 15mm 2.8 fisheye
ISO 3200
f2.8
15sec
Yongunuo YN560 III Speedlite
Yongunuo RF-603C wireless flash trigger