Aperture's main role is to adjust the amount of light. While opening the aperture, only the focus will be shown clearly, the images in other area in the screen would be fuzzy. Then if you reduce the aperture, the original fuzzy area will be clearer. Now let’s go to learn the setting of aperture for many different kinds of photography.
1. Use the small aperture to avoid the shallow depth of field when shooting in macro
Another important factor to affect the depth of field is the shooting distance, use the Macro Lens can help you shoot insects' close-up in a very close distance. The closer the distance to shoot the subject, the more shallow depth of field you will get.
Therefore, when shooting in macro, it is easy to get a shallow depth of field if using a large aperture. We often use the F8, F11, F13 such small and medium-sized aperture to take photograph to ensure that the picture has clear range. If you use a 100mm macro lens to shoot the insects' close-up, even with the F13 aperture, the depth of field is very shallow, and often need to use the manual focus function to carefully adjust the focus position to focus on the eyes of insects and make the picture more vivid.
2. Small and medium-sized aperture in shooting landscape architecture
We often use such the F8, F11, F16 small and medium-sized aperture and the wide-angle lens with the focal length shorter while shooting landscape architectures. It can perform rich detail and delicate level.
3. Use the small aperture to shoot unique asterism
If the subject you shoot contains the sun, street lamps, water reflective light, you should choose such a F11, F16 or even F22 small aperture, magic changes will appear on the screen.
Tips: The Relationship between the asterism and aperture blades
Shooting with a small aperture in asterism photography, there will be some differences if you use different aperture. The amount of asterism depends on the amount of the aperture blades of the lens. If the amount of aperture blade you used is odd, the number of asterism is twice as the aperture blades. Or if it is even number, the number of asterism is equal to the aperture blades. For example, the EF16-35mm F/2.8L II USM has seven aperture blades, then there will be 14 asterism presented on the screen.
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