Why do birds seldom use the small aperture after F8? On setting parameters of bird shooting

People who have experienced bird shooting all know that shooting birds requires a higher shutter speed, usually more than 1 / 500 seconds. Some people may ask: can I shoot static birds with a tripod fixed camera? Can I use such a high shutter speed? Maybe it can be lower in special cases, but in most cases it is still needed. Why? < / P > < p > there are two reasons: one is that the super long focal lens is usually used for bird shooting. This kind of lens is of large weight, volume and length. Even if it is fixed on a tripod, it will not be stable for a while. If there is wind, it is basically difficult to achieve a very stable state, that is to say, it is still in a slight shaking, and the shaking of the hand is even greater. Second, even if the bird seems static, in fact, its head, wings and so on are in constant motion, unless it is a sleeping bird. Based on these two reasons, the shutter speed of bird shooting should not be too low, otherwise it will cause poor clarity. It has been proved by real shooting that when the shutter speed reaches 1 / 500 seconds, it can basically resist dynamic blur. < / P > < p > since the shutter speed is high, it is necessary to use a larger aperture or a higher ISO when combined with the other two elements of exposure. We know that with the improvement of ISO, the image quality will be significantly reduced. Therefore, considering both the shutter speed and image quality, it is necessary to use a larger aperture. < / P > < p > for existing ultra long focus lens products, the maximum aperture of high-end fixed focus lens is generally constant F4, and the aperture of zoom lens will be smaller. For example, Nikon 200-500mm zoom lens is constant f5.6, Tenglong and Shima’s 150-600mm are floating aperture f5-6.3, that is, the maximum aperture is F5 at the 150 mm end. With the increase of focal length, the maximum aperture gradually reduces to 600 mm end The maximum aperture is f6.3. < / P > < p > take f6.3 as an example, when the shutter speed reaches 1 / 500 seconds, it is difficult to keep ISO at the lowest value of the camera even in sunny days. Generally, ISO shooting will be improved. If it is in the shade of trees and cloudy days, ISO will be improved a lot. That is to say, in most cases, the maximum aperture of the lens needs to be improved ISO to shoot. If you shoot birds on cloudy days, i.e. using the maximum aperture of the lens, then ISO will be very high. That’s why shooting birds requires the camera to be more sensitive. < / P > < p > is the depth of field sufficient for shooting with the largest aperture of the lens? From the real shooting point of view, it is no problem to ensure that the bird’s body is in the range of depth of field, because the focus distance of wild birds is relatively large. Of course, if the shooting distance is relatively close, it may not be possible to ensure that the bird’s whole body is within the depth of field if the shooting distance is relatively close, but the problem is not big. First, the aperture can be appropriately reduced for shooting; second, the shooting distance of birds in the field is rarely very close. < / P > < p > the author has read an article about setting parameters for bird shooting, saying that the aperture should be set to f8-11 for the sake of greater depth of field. To say this, we should say that we are just making a blind door and have no real shooting experience. < / P > < p > through the above comprehensive analysis, the parameters are set from two aspects of clarity and image quality, generally do not set a small aperture smaller than F8. < / P > < p > generally speaking, the parameter setting of shooting birds will become simple: shutter speed is the first factor, so we can shoot birds with shutter priority mode, first determine a shutter speed, and then set ISO automatic. In this way, the camera will automatically reach the maximum aperture of the lens when shooting. If the exposure is not enough, the ISO will be automatically increased. < / P > < p > it is also very convenient to use manual mode shooting. First, set the shutter speed, then set the aperture, and set ISO auto. When the starting shutter speed is 1 / 500 seconds, there will be basically no minimum ISO over exposure. < / P > < p > speaking of this, by the way, Canon’s 600 mm and 800 mm fixed focus lenses with the maximum aperture of F11 are not suitable for shooting birds, of course. At least in the case of good lighting and high-sensitivity performance of the camera, it is OK, but if the light is not very good, you will have to use a very high ISO to shoot the flying plate. It should be said that the image quality is not very good. < / P > < p > this article is selected from the column, and there are more chapters. Please pay attention to “Le Xiaoyao photography”. More wonderful content will not be lost! Xiaomi new machine real machine exposure center dig hole screen design or high color thousand yuan machine