What is the Exposure Triangle?
The exposure triangle is a compilation of three settings on your camera that control exposure. The three settings are: ISO, Aperture, and Shutter Speed.
So...what is exposure? Exposure is basically the ability to control the amount of light per unit area reaching the electronic sensor in your camera. Still confused? Read about the triangle, then it will make more sense.
Effects On Exposure: The effects of your aperture on the exposure of your photo is quite large. When your aperture is small (remember, a small aperture means a large number) it lets in more light. This is advantageous when you are shooting in a low light situation, at night for example. When the aperture is large, it lets in less light, which is good when the light is very bright, like outside on a sunny day. Effects on The Photo: Aperture is very important in controlling the depth of field in your photos. Depth of field is basically what is in focus and what isn't. In a picture where every thing is in focus, that is called a large depth of field. When only part of it is in focus, it is called a small, or shallow depth of field. Large aperture will decrease depth of field, while a small aperture will give you a larger depth of field.
Effects on Exposure: If your shutter speed is long, then it lets in more light. if you want the effects of long shutter speed, but don't want a washed out photo, then you can pair it with a large aperture to balance the light coming into the sensor. Effects on the Photo: Shutter speed is very important when capturing an action, whether it is intended to be sharp or blurred. IF you have a short shutter speed, then you will be able to get an in focus action shot, without any motion blur. If you do want motion blur, then you can set a long exposure and have the subject blurred while the background is in focus. You can reverse that, by still having a ling shutter speed, but panning with your subject, so it will be crisp, and the background will be blurred.
Effects on Exposure: If your subject is well lit, then you would want to go for a lower ISO to get the best quality image. If it's darker though, and you want to capture a fast action, you could pair a a higher ISO with a fast shutter speed, to get a lighter image. A higher ISO could also be useful if you are in a dark concert hall, where flash photography is prohibited, or in any other low light situation like this. Effects on The Photo: When working in low light situations, having a higher ISO, can make your image brighter without using flash. The catch , is that when your ISO is high, it will often add grain, or noise to your pictures. In general, it would be advisable to stick with the lowest ISO possible because that will give you the best quality pictures. My camera's exposure settings
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