Canon 75-300mm II USM

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The Canon EF 75-300mm II USM is a telephoto zoom lens designed for Canon's EF mount DSLR cameras. It features ultrasonic motor (USM) technology which provides fast and quiet autofocus performance. The lens covers a versatile focal length range from 75mm to 300mm, suitable for sports, wildlife, and portrait photography. Its construction includes multiple elements and groups optimized for image quality and reduced chromatic aberrations. The lens uses a fully electronic diaphragm for smooth exposure control. It incorporates a metal mount to enhance durability and connection stability with the camera body.

The lens benefits from the USM autofocus system, offering rapid and silent focusing ideal for capturing moving subjects. Its compact and lightweight design enhances portability and handling. The broad focal length range adds flexibility for various shooting scenarios without the need to change lenses. It supports full-frame and APS-C sensors, providing versatility for different camera models. The electronic diaphragm system allows for precise aperture control and smooth exposure transitions. The lens structure ensures good optical performance with minimized chromatic aberration and distortion.

This lens is not a professional-grade L series optic, which may affect its optical sharpness and build quality compared to higher-end models. It lacks advanced lens coatings to reduce flare and ghosting in intense lighting conditions. The aperture range is limited with a maximum aperture of f/4-5.6, which may be less effective in low-light environments. The lens does not feature image stabilization technology, potentially requiring faster shutter speeds to avoid camera shake. Autofocus may be slower or less accurate in certain challenging focus conditions compared to newer lens designs. The plastic construction reduces durability under heavy professional use. Its optical performance may not meet demands of high-resolution sensor cameras fully.

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