Sony SLT camera


Single-lens translucent is a Sony proprietary designation for Sony Alpha cameras which employ a pellicle mirror, electronic viewfinder, and phase-detection autofocus system. They employ the same Minolta A-mount as Sony Alpha DSLR cameras.
Sony SLT cameras have a semi-transparent fixed mirror which diverts a portion of incoming light to a phase-detection autofocus sensor, while the remaining light strikes a digital image sensor. The image sensor feeds the electronic viewfinder, and also records still images and video on command. The utility of the SLT design is to allow full-time phase-detection autofocus during electronic viewfinder, live view, and video recording operation. With the advent of digital image sensors with integrated phase-detection, the SLT design is no longer required to accomplish this goal, as evidenced by cameras such as the Sony NEX-5R, Fujifilm X-100s, and Nikon 1, although the SLT design avoids having pixels unavailable for image formation due to their space on the sensor being occupied by a dedicated phase detection autofocus sensel.
The term "translucent" is a misnomer for the actual SLT design, which employs a pellicle mirror that is not translucent. Pellicle mirrors have been used in single-lens reflex cameras from at least the 1960s.

List of SLT cameras

ModelAnnouncementMegapixelsSensorScreenBuilt-in flash
Sony Alpha 33201014 MPAPS-C3" articulated
Sony Alpha 35201116 MPAPS-C3" fixed
Sony Alpha 37201216 MPAPS-C2.7" tilting
Sony Alpha 55201016 MPAPS-C3" articulated
Sony Alpha 57201216 MPAPS-C3" articulated
Sony Alpha 58201320 MPAPS-C2.7" tilting
Sony Alpha 65201124 MPAPS-C3" articulated
Sony Alpha 68201524 MPAPS-C2.7" tilting
Sony Alpha 77201124 MPAPS-C3" fully articulated
Sony Alpha 77 II201424 MPAPS-C3" fully articulated
Sony Alpha 99201224 MP3" fully articulated
Sony Alpha 99 II201642 MP3" fully articulated

All of the above cameras record 1920x1080 video at 60i/30p, in MPEG-4, AVCHD or H.264 formats. The Alpha 99II also records 4k video at 100Mbit/s with full sensor read-out.
Source: summarised from the .