The Iron Triangle in photography
Refers to the three parameters commonly used by photographers in ** control: aperture, shutter and ISO. The relationship between the three of them will affect the situation of the company, and thus the imaging effect.
The camera's iron triangle is not fixed and requires the photographer to adjust it according to different scenes and shooting needs. For example, a wide aperture can be used for portraits, while a small aperture is suitable for landscapes and business. The shutter can control the brightness and darkness of the frame and capture the subject.
At the same time, the aperture and shutter can also affect the use of ISO, as a high ISO will reduce the quality of the picture, while a low ISO will increase the brightness of the picture.
After being familiar with the concept of the iron triangle, the next step is to gradually grasp the functions of the camera and the interpretation of the characteristics of the lens, of course, including the in-depth understanding of various types of lenses. I would like to carefully explain the functions and characteristics of the two control modes, Aperture Priority and Shutter Priority, and if you are a beginner, you will be familiar with these two functions to make the operation of the camera more smooth.
Aperture priority mode
In this way, the photographer can freely set the aperture size according to his own creativity, by locking the f-number of the aperture, e.g. f63 such fixed values. As for the shutter speed, the camera's built-in automatic metering system is used to ensure accuracy.
Shutter priority mode
This mode allows the photographer to determine the shutter speed by locking the shutter speed as in a 1 160s pattern, instructing the camera to measure the appropriate aperture to achieve better results. Shutter priority mode is similar to aperture priority mode, except that the lock parameters are different, one locks the shutter speed, while the other locks the aperture size.
There are also two options for ISO regulation. The first is for the photographer to decide the ISO level, and the second is for the camera's built-in automatic metering system to handle. In summary, the main difference between aperture priority and shutter priority modes is the effect of different parameters that can be locked.
On the basis of understanding the three elements, you should already know that the role of aperture is to control the depth of field. When the image before and after the focus is clear and the distance range is wide, it is called deep depth of field; Conversely, if the clear distance range is narrow, it is called shallow depth of field.
1.A larger aperture results in a shallower depth of field, and vice versa. If the aperture size does not change, the depth of field will become shallower when the subject is close to the focal point; When the subject is farther away from focus, the depth of field deepens.
2.The longer the focal length, the shallower the depth of field; The shorter the focal length, the deeper the depth of field.
3.The aperture not only controls the depth of field, but also directly affects the image quality. In general, a medium aperture value for a lens is often the best aperture choice for the best image quality.
When should I use aperture priority mode?
The wide aperture is often set to ensure the clarity of the depth of field, and this effect can be achieved by locking the aperture value. When you need to capture the momentary stillness of a dynamic subject, especially when shooting a static subject, you will often choose to use the aperture priority mode. In this way, you can avoid the trouble of paying attention to the speed of the subject's own movement, and maintain the best clear effect. On the other hand, if you want to achieve quiet sharpness, or if you need to shoot in low light, you need to choose the shutter priority mode.
When to use Shutter Priority mode?
When you need to freeze the momentary image of the image, such as shooting birds and waves in nature; and when you want to slow down the shutter speed moderately and produce rhythmic long** works (such as tracking birds with fast movements), you should undoubtedly choose shutter priority mode.
When is it better to manually adjust the aperture or shutter speed?
In the case of long periods of time, the manual option is more advantageous. For example, when shooting car tracks for a long time at night, reducing the aperture size can reduce the amount of light entering and prevent the light in the picture from being overexposed. Therefore, in such cases, aperture priority should be the dominant setting, and shutter speed and ISO can be tied as an auxiliary option.
How do I use the Focus Tracking mode?
If you want to capture a fast-moving animal theme (such as flying birds), or if you want a slow shutter speed to capture sports competitors and moving objects (such as sprinters), you will need to use the shutter priority mode while switching the focus mode to continuous focus mode. Depending on the actual light conditions, the aperture size and ISO parameters can also be manually adjusted, and even the automatic range using the sensitivity can be selected to prevent underexposure caused by over-movement.
Therefore, in different shooting scenes, the relationship between the three elements can be divided into the following different stages:
1.Basic Stage: In most cases, controlling the aperture size and shutter speed is the basic means of control. When ** is insufficient, the shutter speed and aperture size can be increased; When excessive, the shutter speed and aperture size can be reduced.
2.Special** stage: In some special shooting scenes, the aperture size and shutter speed cannot be adjusted, such as motion blur, light transitions, etc. In this case, it is particularly important to adjust the ISO sensitivity to control**. The higher the ISO value, the brighter the image and vice versa.
3.*Interaction of the three elements: In some cases, there may be an interaction between aperture size, shutter speed, and ISO sensitivity. For example, increasing the aperture increases the brightness of the image, but at the same time reduces the depth of field; Shortening the shutter speed captures moving scenes, but is prone to blurring; Increasing the ISO sensitivity results in brighter images, but increases the noise of the image. Therefore, when shooting, it is necessary to balance and make trade-offs according to actual needs.
Overall, the balance and coordination of the three elements is crucial to the success of the shoot. Only by mastering the relationship between the three elements and making appropriate adjustments and choices according to different shooting scenes can we shoot satisfactorily.
In addition, how to choose the appropriate control mode and give full play to the effect of the lens are important skills that every photography enthusiast continues to Xi learn and hone in practice. Only by constantly trying and exploring can you become a true master of photography! I can constantly promote the continuous improvement of my photography skills.
If you have any different opinions, please discuss in the comment area and learn from each other Xi improve each other.