Markus, who specialises in bird photography, has been photographing white-tailed eagles hunting for many years and knows it is a demanding test for his photographic kit. That's why he chose this task to test Canon's EF 600mm f/4L IS III USM lens – the world's lightest 600mm f/4 lens, featuring 5-stop image stabilisation and sharp ring-type USM autofocus.
Helsinki-born Markus was a bird-watcher long before he became a bird photographer. He began studying bird identification and behaviour when he was 10, but this didn't fully morph into photographing birds until he was in his late 20s. After a successful career in business, he became a full-time professional wildlife photographer at the age of 45. His awards include a World Press Photo Award in 2014.
Here he talks about his life-long passion for bird photography, the challenges of photographing the white-tailed eagle, and how he created his spectacular and dramatic images of this extraordinary bird, using the Canon EF 600mm f/4L IS III USM lens.