audiovisual technology Tag

Remember those old slide projectors from school? The big, clunky ones the teacher would wheel into the classroom, then spend 10 minutes trying to get aligned just right so the image would actually show up on the screen without looking tilted or blurry? Those things were state-of-the-art back in their day! While slide projectors have mostly gone the way of chalkboards and overhead projectors, replaced by sleek, modern digital projectors, they were an important transitional technology between still images like photographs and moving images like movies. Understanding how sliding projector work provides a glimpse into the evolution of visual media and presentation technology.