Manual slide projectors, such as the Sawyer Rotomatic Series, were popular in the late 1960s and early 1970s, and many remain in use. Unlike a modern projection show, Sawyer projectors are dependent on bulbs. A burnt-out bulb can bring a presentation to a halt. The ease of changing the bulb in a Sawyer slide projector is one of the reasons the brand became so popular. Tips Warnings Writer Bio
