The images are too red untreatable in Photoshop, never vegetation white spring as it should, but greenish; sure, LOTS of visible light to pass through.
For example, my D7000, f / 4, 100iso, takes only 1.4 sec to capture the image, then logically it should be worth a few minutes.
Article to flee, for those who do not have the means to buy cheap. Immediate return of my copy from Amazon.