Canon has announced that the 50mm F1.4 USM lens has a factory defect and has started free control and servicing of these lenses.
Canon in its offer has a few fifties, including but not limited to 50mm F1.4 USM . It turns out that the lens has a problem. Fortunately, Canon has resolved to fix it himself and decided to start the free inspection and service of these fifty. What is the fault and which lenses are covered by free repair? It's all about the fact that the lens can fade at the moment when we focus on infinity. What's interesting about this is both automatic and manual focus. The lens is stuck here:Fortunately, not all lenses face this problem. These are the glass whose serial numbers start with 4918, 5018, 5118, 5218, 5318, and 5418. Note that the serial number will be located on the inner ring on the securing side. If your lens qualifies for free inspection and service, report directly to Canon or an authorized Japanese manufacturer. A full statement (in English) is available on the manufacturer's website . Source: Canon