Data projectors are designed to show images such as business graphics, line drawings, presentations, spreadsheets, and PDF files. They’re optimized for conference rooms, throwing a bright enough image to stand up to ambient light on a large screen. Many can handle photorealistic images well enough to project short video clips in a presentation, but they aren’t good for full-length movies. They tend to favour brightness over contrast, which is an important factor for producing realistic-looking images.