What Does Aperture Do? Aperture f/22f/16f/11f/8f/5.6f/4f/2.8 Aperture is smallless light Aperture is bigmore light Aperture is the opening inside your lens. The bigger the opening, the more goes through! Aperture is small = f/22. Aperture is big = f/2.8. Yes, it seems backward. Small number = big hole. Big number = small hole. Previous lesson:← What Are the Three Exposure Settings?↑ Back toUnderstanding ExposureNext lesson:How Aperture Works: The Faucet and the Cup →