english: And this picture here, it's really interesting, it shows two things: First of all, it's in black and white because the water was so clear and you could see so far, and film was so slow in the 1960s and early 70s, you took pictures in black and white.
non_english: Deze foto hier is echt interessant, het laat twee zaken zien. Om te beginnen is het in zwart-wit. Omdat het water zo helder was en je zo ver kon zien en de film nog zo weinig gevoelig was in de zestiger en begin zeventiger jaren, werd er nog in zwart-wit gefotografeerd.