If you suspect that your autofocus is broken, there are a few steps you can take to troubleshoot the issue. First, make sure that the autofocus switch on your lens is turned on. Next, check the camera settings to ensure that autofocus is enabled. If the issue persists, try cleaning the lens contacts and the autofocus sensors on the camera. If none of these steps resolve the problem, it may be necessary to have your camera and lens inspected by a professional technician. **

An objective autofocus is a type of autofocus system that uses sensors to detect the distance between the camera and the subject in order to automatically adjust the focus of the lens. This helps ensure that the subject is always in sharp focus, making it easier for the photographer to capture clear and crisp images. Objective autofocus systems are commonly found in digital cameras and are especially useful for capturing fast-moving subjects or in low-light conditions. **

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The autofocus may not be working due to a variety of reasons such as a dirty lens or sensor, low light conditions, incorrect camera settings, or a malfunctioning autofocus system. It is important to check these factors and troubleshoot the issue to determine the exact cause of the problem. If the issue persists, it may require professional repair or servicing. **

Autofocus is a feature in cameras that automatically adjusts the focus of the lens to ensure that the subject of the photo is sharp and clear. This feature is especially useful when capturing moving subjects or when shooting in low light conditions. Autofocus works by using sensors to detect the distance to the subject and then adjusting the lens to bring the subject into focus. This allows photographers to quickly and accurately capture images without having to manually adjust the focus. **

Canon's autofocus system uses a combination of phase detection and contrast detection to quickly and accurately focus on subjects. Phase detection sensors are used to measure the distance to the subject, while contrast detection sensors are used to fine-tune the focus. Canon's Dual Pixel CMOS AF technology, found in many of their cameras, splits each pixel into two separate photodiodes for phase detection, allowing for smooth and precise autofocus during both still photography and video recording. Additionally, Canon's autofocus systems often include advanced tracking and subject recognition capabilities to further enhance the accuracy and speed of focusing. **

To determine if the autofocus of the lens is broken, you can perform a few tests. First, check if the autofocus switch on the lens is set to "AF" and not "MF" (manual focus). Next, try using the autofocus on different subjects and at different distances to see if it consistently fails to focus. If the autofocus still doesn't work, try cleaning the lens contacts and the camera's lens mount to ensure a good connection. If none of these steps resolve the issue, it's possible that the autofocus mechanism is indeed broken and may need to be repaired or replaced. **

Yes, there is a Samyang 12mm lens without autofocus. The Samyang 12mm f/2.0 NCS CS lens is a manual focus lens designed for mirrorless cameras. It is known for its wide-angle perspective and fast aperture, making it a popular choice for landscape and astrophotography. While it lacks autofocus, it offers excellent image quality and is favored by many photographers for its sharpness and compact size. **