Sony SLT camera
Single-Lens Translucent (SLT) 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.[1]
Sony SLT cameras have a semi-transparent fixed mirror which diverts a portion of incoming light to an 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 and video recording operation.[2] 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.[3][4]
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 (see Canon Pellix).
List of SLT cameras [edit]
- Sony Alpha 33
- Sony Alpha 35
- Sony Alpha 37
- Sony Alpha 55
- Sony Alpha 57
- Sony Alpha 58
- Sony Alpha 65
- Sony Alpha 77
- Sony Alpha 99
See also [edit]
- Pellicle mirror
- Digital image sensor
- Electronic viewfinder
- phase-detection autofocus
- Digital single-lens reflex camera
References [edit]
- ^ "Lenses for Translucent Mirror cameras". Sony.com.
- ^ "Sony Single-Lens Translucent Cameras". KolariVision.com.
- ^ "Fujifilm's phase detection system explained". Digital Photography Review.
- ^ Mike Tomkins. "Nikon V1, J1: Two new compact system cameras for Nikon's mirrorless debut". Imaging Resource.
