He was the director of photography on most of Ingmar
Bergman´s films.But he also worked with
Woody Allen and Andrej Tarkovskij and many others.
Films like The Unbearable Lightness of Being, Sleepless in Seattle,
Såsom i en spegel (Through a Glass Darkly), and Offret
(The Sacrifice) all bear the mark of Nykvist´s masterful handling
of the light.
There is a book by Nykvist and Bengt Forslund called
In Reverence of Light. The title tells us what Nykvist´s work
was all about. He was a great man.
He was one of the greatest photographers ever. Through movies like, "Through a Glass Darkly", "Persona", "Autumn Sonata", "Fanny & Alexander" and "The sacrifice", I was inspired to pick up photography. Later when he worked with Kaufman and Allen, that served as another boost of inspiration.
Please, have a look at: http://en.wikipedia.org/wiki/Sven_Nykvist