All glaciers start out as a spotless pure white blanket, gaining more – darker – colors as they proceed downhill. The result is a rich variation of forms, sprinkled with subtle blue tones, but these details may lay so far away that you need a long lens to extract them.
This is why I always carry a 500mm telephoto, and consider it a great landscape lens. Actually landscape use was one of the deciding factors between the 500 and the 600.
Shot with the Canon EOS 5DS R and EF 500mm f/4L IS II USM lens. The new Mark II provides enough resolution to feed the hungry 5DS R sensor.