Sony A55

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The Sony Alpha A55 features a 16.2-megapixel APS-C CMOS sensor that provides high-resolution image capture with excellent low-light performance. It utilizes Sony’s Translucent Mirror Technology (SLT) to enable fast continuous shooting at up to 10 frames per second without interruption of the autofocus. This SLT design permits phase-detection autofocus during video recording, delivering smooth and accurate focus transitions. The camera includes a built-in electronic viewfinder with a resolution of approximately 1.44 million dots, providing real-time exposure and manual settings monitoring. Video recording capability includes Full HD (1080i) 50/60 fps with stereo sound, allowing for high-quality multimedia capture. Its BIONZ image processor enhances image detail and color accuracy while reducing noise in high ISO settings up to ISO 16000.

The Alpha A55's fastest continuous shooting in its class supports capturing fast-moving subjects with precision. Its Translucent Mirror Technology offers seamless autofocus during both stills and video, a significant advancement over traditional DSLRs. The camera's electronic viewfinder offers a bright, clear, and lag-free viewing experience with real-time exposure previews. Compatibility with Sony's extensive Alpha lens lineup ensures versatility for various photographic styles. Full HD video recording combines with continuous autofocus for versatile video capture. The compact and lightweight design enhances portability without compromising on ergonomic handling or build quality.

Despite its innovative SLT technology, the Sony Alpha A55 has a somewhat limited battery life compared to comparable DSLRs due to constant use of its electronic viewfinder. The resolution of the rear LCD screen (3.0 inches, 921k dots) while good, may not meet the expectations of users seeking higher resolution displays. Its video recording is limited to interlaced Full HD 1080i rather than progressive scan 1080p, which may affect video quality for professional users. Noise performance at very high ISO settings can show more grain compared to newer sensor technologies. The fixed translucent mirror means the camera cannot use an optical viewfinder, which some photographers prefer for clarity and lag-free viewing. The autofocus system, although fast, might struggle in very low-light conditions compared to some modern mirrorless cameras.

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