![]() The shutter speed is also principally responsible for controlling the amount of blur in a picture. Just as the aperture affects the exposure as well as the depth-of field, the shutter affects more than just the exposure. That's me! Typing away on this article from my studio in Meridian, Idaho. Take a minute and make sure you understand this info before moving on. If you, like me, are more of a visual learner, then I think this graphic will help solidify the information about aperture. If you want to take a picture of a sweeping mountain vista, you'd want to use a small aperture size (high f-stop number) so that the entire scene is in sharp focus. If you want to take a picture of a person with a blurry background, you'd use shallow depth of field. Depth-of-field is how much of the picture is sharp, and how much is blurry. The aperture also controls the depth-of-field. The size of the aperture controls more than the brightness or darkness of the picture, though. If you take a picture and it's too dark at f/5.6, would you choose a lower f-stop number or a higher one? Yep! You'd choose a lower f-stop number, which opens up the aperture to let in more light. Let's test your knowledge to make sure you have it down. A high f-stop like f-22 means that the aperture hole is quite small, and a low f-stop like f/3.5 means that the aperture is wide open. Simple! Aperture sizes are measured by f-stops. How do you fix it? Simply choose a smaller aperture. So suppose you take a picture that is too bright. Obviously, if you shoot with the aperture wide open, then more light is allowed into the camera than if the aperture is closed down to only allow a tiny hole of light to enter the camera. The blades create a octagonal shape that can be widened (we photogs call it shooting “wide open”), or closed down to a small hole. explanation of U.S.The aperture is a small set of blades in the lens that controls how much light will enter the camera.A Tedious Explanation of the f/stop by Matthew Cole.Some Kodak cameras with simple lenses had a simplified aperture scale 1-2-3-4, meaning (estimated) U.S. For example the popular Kodak Anastigmat f7.7 (f-stop) was sold together with shutters with max. The Unified System (U.S.) diaphragm numbers can be found on many U.S.-made leaf shutters made between 18, whilst the speed of U.S.-made lenses could have been documented as f-stop value. ![]()
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