Complex sentence: Since 1968 he has been a correspondent with Magnum, the photographic cooperative, and from 1968 to 1992, he was the "New York Times" photographic correspondent from Israel.
Split into simpler sentences: Since 1968 he has been a correspondent with Magnum, the photographic cooperative. From 1968 to 1992, he was the "New York Times" photographic correspondent from Israel.