Complex sentence: The body was made of bakelite, which was a very common camera body material at that time and while the initial version of this camera used 828 film, the four later versions were adapted to use 135 film.
Split into simpler sentences: The body was made of bakelite, which was a very common camera body material at that time. While the initial version of this camera used 828 film, the four later versions were adapted to use 135 film.