Just a thought for those who criticise any enhancement. It did not start with digital, or photo shop. Many years ago I did a lot of B/W photography. And used filters on the camera at times, such as darkening the sky, enhancing clouds etc. Different developer which gave different results. Different printing papers which gave different results. Bits of paper to hold back the light from the enlarger to either burn in unshaded parts or to hold back the light from certain exposed parts. What's the difference? And more which I have forgotten. It was common practice. Whatever the method used in the above photos they are still beautiful pictures.