Complex sentence: At the height of their popularity in the 1950s and 1960s, many brands of Movie cameras came with a Wollensak "Velostigmat" lens, while their reel-to-reel tape recorders were prized for their robust construction and value.
Split into simpler sentences: At the height of their popularity in the 1950s and 1960s, many brands of movie cameras came with a Wollensak Velostigmat lens. Wollensak reel-to-reel tape recorders were prized for their robust construction and value.