Sony SLT ALPHA A77

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The Sony SLT Alpha A77 is a 24.3-megapixel APS-C format DSLR-style camera that employs a translucent mirror technology allowing for fast autofocus and continuous shooting. It features a 23.5 x 15.6mm Exmor CMOS sensor coupled with the BIONZ image processor, delivering high-resolution images and low noise performance. The camera uses a unique fixed semi-transparent mirror which enables the use of phase-detection autofocus during live view and video recording. It supports a fast 12 frames per second burst shooting capability due to its advanced shutter and mirror mechanisms. The electronic viewfinder provides a high-resolution display with 100% frame coverage and 0.71x magnification. Connectivity features include HDMI output and USB 2.0 support, while video recording is available in full HD 1080p with stereo sound.

The SLT Alpha A77 offers extremely fast continuous shooting up to 12 fps, ideal for action and sports photography. Its translucent mirror technology allows for continuous phase-detection autofocus during video and live view use, improving focus speed and accuracy. The camera provides high-resolution image quality from its 24.3MP APS-C sensor combined with the BIONZ image processor. A high-resolution electronic viewfinder with 100% frame coverage helps precise composition. Additionally, full HD video recording with multiple frame rate options provides versatile multimedia capability. The camera body is weather-sealed and ergonomically designed for comfortable handling during extended use.

The translucent mirror design, while innovative, reduces light transmission by approximately one-third, which can affect low-light performance compared to conventional DSLRs. The camera's ISO sensitivity range, although broad, may produce noise at higher settings in very dark conditions. Its autofocus system, while fast, relies on a fixed mirror, limiting the use of optical viewfinder phase-detection autofocus compared to traditional DSLRs. The electronic viewfinder, despite high resolution, may exhibit slight lag or noise in darker scenes compared to optical viewfinders. Battery life is moderate given the power demands of the electronic viewfinder and fast shooting. Additionally, the camera does not feature built-in Wi-Fi connectivity, which can limit image sharing convenience.

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