What are the equipment selection and shooting techniques for Canon 5D Mark III high-resolution photography?

The equipment selection and shooting techniques for Canon 5D Mark III high-resolution photography are as follows: Pay attention to camera shake when placing a tripod. When shooting, start with the thicker leg and finally expand it completely. Choose a tripod with strong stability. Image processing cannot correct camera shake, so it is important to take corresponding countermeasures when shooting. It is necessary to use a tripod to prevent camera shake, and there are some tips for choosing a tripod. For a tripod, it is very important whether the legs are thick enough. Large and heavy tripods have strong torsional rigidity and are less likely to vibrate. The way to test the torsional rigidity is to hold the two ends of the two leg tubes with both hands when the tripod is fully extended, and try to twist the leg tube to test the rigidity. Carbon fiber tripods, which are popular because of their small weight, have poor torsional rigidity, so be careful when choosing. A slightly heavier metal tripod is better. The length of the tripod should be so that the height of the tripod, camera and head is exactly at eye level when the central axis is not raised. In addition, the "load-bearing capacity" marked on the tripod is not standardized among various manufacturers. can be used as a reference quantity. The total weight of the Canon 5D Mark III body, EF 70-200mm f/2.8L IS II USM and ordinary gimbal is about 3 kilograms. Even if this weight is within the load-bearing capacity range marked in the tripod specifications, it should not be taken lightly. The stability must be confirmed by actual operation. In addition, hanging heavy objects such as camera backpacks on the hooks under the central axis can increase the weight of the tripod and make it more stable. The gear gimbal can finely adjust the composition through the knob. The gimbal can be locked while adjusting. The direction of the gimbal will not shift even after the knob is no longer turned. Suitable for landscape and night scene photography. Choose a gimbal based on operability and locking force. The gimbal that holds the camera is also marked with a load-bearing capacity. But as mentioned in the tripod introduction, there is no unified standard for the load-bearing weight of the head. Although a gimbal with a larger load-bearing capacity is safer, like a tripod, load-bearing is not the only criterion. Another standard that can be used as a reference is the "screw" that connects the tripod and the head. There are two types of screws. A gimbal using screws with a diameter of about 9 mm is more stable than one using 6 mm screws. In addition, regarding the size of the gimbal, the larger the area that can cover the bottom of the camera, the better. The locking method is generally three-dimensional. Choose a gimbal that can lock securely with only a small amount of effort. The gear head is more suitable for landscape photography and other occasions that require precise adjustment of composition. Although the gear gimbal is difficult to deal with suddenly moving subjects, it is suitable for high-resolution photography that requires precise horizontal and vertical adjustments. In addition, don’t forget the above considerations when choosing a gear gimbal. Use a shutter release cable to eliminate the possibility of tiny jitters. Preventing Shake by Shutter Operation When taking high-resolution photography, be sure to use a shutter release cable. Be careful when pressing the shutter button and watch out for tiny shakes. If you don’t have a shutter release cable on hand, you can also use the camera’s Selfie function. Reduce the vibration caused by your fingers to the camera by delaying the shutter release time. An effective way to prevent camera shake is to shoot with Live View. Because Live View shooting is performed with the mirror pre-raised, there is basically no mirror vibration, and part of the shutter action is also electronic, further reducing vibration. Compared with raising the mirror for normal shooting, the mechanical action of the shutter is different for real-time display shooting, so vibration can be better suppressed. Precise focus with Live View shooting Live View shooting displays a 3D electronic level. You can check the tilt of the camera. Live View shooting mode that enables approximately 5x or 10x magnification. The high-resolution capabilities of the camera and lens can be fully utilized through precise focusing. Therefore, in high-resolution photography, the magnified display function of Live View shooting must be used flexibly and effectively. Although Live View shooting can also use autofocus, manual focus is best when precise focus is required. After adjusting the composition in normal full-screen display, you can flexibly use about 5x and 10x magnification displays to accurately focus on details. Canon 5D Mark III is also equipped with a clear display LCD monitor type II, which can obtain a bright and detailed real-time display image for easy focusing. In addition to shooting night scenes, because the LCD panel reduces external light reflection, it is also convenient to observe the real-time display during the day. Photography tips to maximize lens performance. Install a lens hood to prevent contrast loss. Use lens accessories flexibly and effectively. It is a basic principle of photography to use a lens hood no matter what the occasion. In high-resolution photography, harmful light can cause glare or ghosting to reduce image contrast, so be sure to use the hood flexibly and effectively. In addition, a tripod adapter should also be used when using a heavier telephoto lens. Various countermeasures such as adjusting the center of gravity position to prevent shaking should be taken. To take an overall sharp image, you must confirm the depth of field in advance. Use lens accessories flexibly and effectively. Any lens has a peak resolution and an aperture value that can achieve the peak resolution. It is generally believed that reducing the aperture by 1 to 2 stops from the maximum aperture can effectively suppress lens aberration, but the ideal aperture value of different lenses also varies. In addition, when creating works, sometimes it is necessary to shoot with a large depth of field, which requires adjusting the aperture according to the shooting situation. You can use the depth of field preview button to check the overall focus of the picture and confirm the depth of field when the aperture is reduced to the set value.

In addition, by making full use of DPP's digital lens optimization function after shooting, Canon 5D Mark III has no problem shooting at apertures such as F16 or F22, which can later reduce the impact of diffraction phenomena that are prone to occur at small apertures. Prioritize the subject's condition and choose an appropriate aperture value. Understand the lens characteristics through the MTF curve. A zoom lens that can cover a wide focal length has different resolutions at different focal lengths. Although the focal length range with higher resolution will change depending on the type of lens, the general trend can be grasped through the MTF characteristic curve. The picture below shows the resolution of EF 24-105mm f/4L IS USM. The edge quality of the image at 105mm is higher than that at 24mm. The horizontal axis of the MTF characteristic curve represents the change characteristics of the resolution from the center of the image to the edge. The closer the curve is to the ordinate 1 (the curve is above the coordinate), the higher the resolution. In addition, the solid line and the dotted line represent the resolution in the radiation and concentric circle expansion directions respectively. The higher the overlap between the two curves, the less uneven the imaging will be, and the more beautiful the blur will be. The F8 curve is closer to 1 than the maximum aperture curve, due to the reduced effect of aberration. It is difficult to fully understand the lens performance from the MTF characteristic curve, but it can still be used flexibly and effectively as a reference data. The brightness of the image will change the sense of resolution. Standard exposure. Darker exposure. Brighter exposure. Different image brightness gives different impressions. Color saturation and contrast also affect resolution. Changes in image brightness will not affect the actual resolution, but in landscape photography, dark-toned images are calmer and have a higher sense of resolution than standard-exposure images. In-camera RAW development and RAW development in DPP can change the brightness of the image, but the adjustment range should not be too large. When shooting, you can flexibly use the exposure compensation and automatic exposure bracketing functions to shoot images that are slightly darker or lighter than the standard exposure. Refer to the standard exposure calculated by the camera and use exposure parameters that can improve the resolution.