![]() Use a bulb blower to shot some air into your AF sensor.The same way as you do when cleaning your camera sensor. From your camera menu, choose “Lock mirror for cleaning”.To clean your AF focus, follow the steps below: ![]() Sometimes the autofocus sensor is dirty, which, of course, leads to consistent focusing problems. Use a bulb blower to remove dust, then use a swab and isopropyl alcohol or cleaning solution. The process of cleaning these contacts is easy. When the contacts get dirty, it can interfere with the focus system and create an error message. The lenses are provided with metal contacts that connect with similar contacts in the camera body to establish the communications ways between the lens and the camera. For more detailed information, you may check my post “ How To Calibrate Your Lens- Enhance Autofocus Accuracy” and “ How To Use Sigma USB Dock- Calibrate And Customize Your Sigma Lens” This might mean that your camera and certain lenses aren’t playing together nicely and it is time for a tune-up or a calibration. ![]() The small switch on your lens lets you toggle between the two but often it’s easy to forget to switch back to autofocus.Īfter using your camera for sometimes or you just buy a new lens, you may find that your camera’s autofocus is not working well and you get blurry photos for no apparent reason. The most obvious and often overlooked cause is forgetting switching your lens to autofocus mode. The AF-Area Mode”, which allows photographers to choose several options to use while operating in Single Area/Continuous modes.Ĭommon autofocus problems and how to fix them The focus modes are summarized in the following table: Modern DSLR cameras have a built-in system to handle such situations. However, if you have a subject that is continuously moving, you need your camera to readjust focus automatically as you take pictures. If the subject moves, you reacquire focus again and take another picture. When photographing still subjects, you generally acquire focus once and take a picture. When a lens starts to “hunt” for focus, it simply means that a camera cannot find enough contrast and sharpness to be able to acquire focus. If it is blurry, the AF system will adjust the lens focus until sharpness/contrast is achieved. The term “detect contrast” means that the AF system tries to look for sharpness in a particular part of an image.
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