USM stands for Ultrasonic Autofocus Motor. These lenses offer manual focus override and fast, smooth and comparatively quiet ...
For our 2025 Component Abuse Challenge there have been a set of entries which merely use a component for a purpose it wasn’t quite intended, and another which push misuse of a part into ...
Every modern automobile carries a 17-character vehicle identification number, an alphanumeric string unique to that single car. Since 1981 federal rules have required that ...
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