aperture stop Directory References Discover What Is the Emoluments Clause? 7 of the World’s Deadliest Plants Secret Service Code Names of 11 U.S. Presidents Ten Days That Vanished: The Switch to the Gregorian Calendar 10 Great Sports Rivalries 6 Animal Species that Mate for Life 6 Animals That Eat Their Mates Contents Ask Our Chatbot a Question aperture stop optics Ask Our Chatbot a Question Learn about this topic in these articles:description In aperture…the aperture is called an aperture stop. Thus, an aperture stop determines the amount of light that traverses an optical system and hence determines the image illumination.Read More Britannica ChatbotChatbot answers are created from Britannica articles using AI. This is a beta feature. AI answers may contain errors. Please verify important information using Britannica articles. About Britannica AI.