Fitted with a 24.3 million pixel full-frame sensor, Sony says that the main target for the a99 is professional photographers, and those using its previous cameras including the a900, a700 and a77.
It is the first camera in the world to use translucent mirror technology with a full-frame sensor. That means that instead of flipping out of the way as it would in a DSLR, the mirror is a fixed, translucent device to allow a proportion of the light through.
A new Bionz processor is included, which facilitates fast frame rates of up to 10fps, 14-bit raw output, full HD video recording and sensitivity up to ISO 25,600.
Several other new technologies have made it on board the a99, including a multi-segment optical low pass filter, light concentration technology and photo diode expansion technology.
Being a DSLT, the a99 has an electronic viewfinder (EVF). This is a 2369k dot device, which offers 100% coverage and includes options such as a focus magnifier.
The LCD screen is a 3-way, 921k dot Xtra Fine LCD screen which also incorporates white magic technology.
Light
Sony claims that the magnesium alloy construction of the a99 makes it the world's lightest full-frame camera. It also has dust and moisture protection.
Dual memory card slots can either take two SD cards, or one SD and one memory stick. There's no sign of Sony using the XQD card which it manufactures for the Nikon D4.
Developed in conjunction with Sony's broadcasting experts, full HD video is available at 60p and 24p. Full manual control will be available, along with a headphone jack and a silent multi-controller at the front of the camera.
Availability and price
The Sony Alpha 99 price will be around £2500 (body only), with a release date of the beginning of November.
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