Tamron af意思

"Tamron AF" stands for "Tamron Autofocus." Tamron is a company that produces a wide range of photographic lenses, including zoom lenses, for various camera systems. The "AF" designation indicates that the lens is equipped with autofocus capabilities, which means it can automatically focus on subjects within the frame when used with a camera that has an autofocus motor.

Tamron lenses with the AF designation were designed to work with cameras that have either a built-in autofocus motor or a compatible autofocus system. When mounted on a compatible camera, the lens can automatically focus on subjects by moving its internal lens elements based on the camera's focus detection system.

It's important to note that Tamron has also introduced lenses with "AF-S" or "AF USD" (Ultrasonic Silent Drive) designations, which indicate that the lenses use quieter and more precise autofocus motors. These newer lenses may offer faster, more accurate, and quieter autofocus performance compared to the original AF series.