Five ways to solve the problem of blurred photos

Lead: To solve the problem that photos are not sharp, the camera settings should ensure the correct focusing mode and accuracy, and the correct settings should prevent machine shock. Let's take a look at five situations to solve the photo blur.

Even the most advanced autofocus and image stabilization systems cannot completely eliminate false images. There are three main factors that may lead to false images: focusing, moving subject and machine vibration. It is often difficult to determine which factor causes the defocus of a picture. If the whole picture is empty, it is usually caused by machine vibration; However, if only the subject is virtual and other areas of the picture are relatively clear, then this may be caused by inaccurate focus or subject movement.

0 1 When shooting a fast-moving subject, the subject is not clear.

In order to capture the instantaneous motion of an object clearly, a high shutter speed is needed, but to make the shutter speed high enough, the ISO value needs to be increased accordingly. In addition, it is necessary to ensure that the autofocus point is located on the subject, and the autofocus mode is set to servo autofocus or continuous autofocus mode.

You can also shoot this kind of subject by panning, that is, the mobile camera tracks the movement of the subject, so that the subject is still clear and the background is dynamic and blurred. It takes practice to master the dithering technology, which can give the picture stronger tension and immersive feeling.

When shooting a still object, the background of the picture is clear, but the subject is not real.

This problem is easy to occur when shooting with large aperture and shallow depth of field, because the depth of field is very shallow, and this phenomenon will occur as long as the focus shifts slightly and falls on the background.

If the subject is on one side of the picture, it is necessary to select autofocus points with the same position so that they overlap as much as possible. Then half press the shutter to focus until the subject is clearly in focus, and then press the shutter fully to complete the shooting.

The whole picture is blurred, and there is no clear area at all.

This situation is mostly caused by machine vibration. When the shutter speed is low, the exposure time is long, during which the slight shaking of the camera will affect the picture. If you don't have a camera,

If you stabilize the system, you will get a completely blurred picture, so you should always pay attention to the shutter speed value when shooting to avoid such mistakes.

The longer the focal length of the lens used, the greater the vibration to the machine? The more obvious the magnification effect, so make sure the shutter speed is high enough to avoid the influence of machine vibration. Roughly speaking, taking a full-frame camera as an example, the safe shutter speed is at least the reciprocal of the focal length of the lens used. That is to say, if the focal length of your lens is 250mm, the shutter speed must be at least 1/250 seconds to ensure the picture is clear. If your camera sensor is not Quan Huafu, the shutter speed is higher, because the effective focal length of the lens is longer than that of a full-frame camera. Therefore, if the same 250mm lens is used on the fuselage in APS-C format, the shutter speed must reach 1/400 seconds or even 1/500 seconds to be safe. In order to make the shutter speed reach this value, it is necessary to improve the sensitivity, especially in low light environment.

If the shutter speed is lower than the safe speed, enabling the image stabilization system or anti-shake function can also help you reduce the risk of some false images. However, these functions are not omnipotent, and it is still necessary to ensure that the shutter speed reaches a safe speed, unless you want to deliberately create a dynamic blur effect.

When the off-center autofocus point is enabled, the autofocus system cannot lock the focus on the subject.

The autofocus system of most SLR cameras needs enough ambient light to identify the contrast and details of the subject and complete normal focusing. On most cameras, the sensitivity of the non-central autofocus point is lower than that of the central autofocus point.

Therefore, when shooting with a lens with a small maximum aperture (such as below f/5.6) in a weak light environment, the focus should be focused as much as possible on the center.

Although a tripod is used, the picture is still empty!

It's really annoying that the photo is still virtual after trying to install the tripod. The first thing you need to check is whether you have turned off all the anti-shake functions of the camera and lens, because turning on these functions at this time will be counterproductive and reduce the clarity of the picture.

If it is not for this reason, then the biggest possibility is that the fuselage moved during exposure. Using a remote shutter or a selfie timer can further prevent the fuselage from shaking. In addition, carefully check the tripod legs to see if they stand on a solid ground. In windy days, it is necessary to add some loads to the tripod to enhance its stability, such as hanging heavy objects such as camera bags under the central axis of the tripod.