Complex sentence: Shooting and developing photos and then providing the copy that accompanied the photo made him a mainstay for the thousands of images he took of Hollywood celebrities now part of the Globe Photo images collection that are highly revered and often replicated.
Split into simpler sentences: Shooting and developing photos and then providing the copy that accompanied the photo made him a mainstay for the thousands of images he took of Hollywood celebrities. These photos are now part of the Globe Photo's images collections that are highly revered and often replicated.