Complex sentence: Unlike the others, the FA used plastic top and bottom plates, which undoubtedly did not endear the camera to longterm Nikon owners, and had a distinctly larger pentaprism cover to house its extra electronics.
Split into simpler sentences: Unlike the others, the FA used plastic top and bottom plates, which undoubtedly did not endear the camera to longterm Nikon owners. The FA also had a distinctly larger pentaprism cover to house its extra electronics.