Sony's flagship SLT camera — the A99 II, ~42.4MP full-frame, translucent mirror, 5-axis IBIS, 4K, 2016.
The Sony A99 II is a full-frame professional camera announced in 2016 and the flagship of Sony's SLT (Single-Lens Translucent) A-mount line, succeeding the A99. It arrived as one of the last high-end A-mount bodies as Sony shifted its main development to the E/FE mirrorless system, and it gave committed A-mount users a modern high-resolution 35mm-format body.
It uses Sony's translucent fixed mirror design: a semi-transparent mirror passes most light to the sensor while feeding a dedicated phase-detection module, and it combines that with on-sensor phase detection in a hybrid autofocus system. It carries the Sony A (Alpha) bayonet mount and accepts A-mount and adapted Minolta AF lenses. The body has a full-frame sensor of about 42.4 megapixels, five-axis in-body image stabilisation, an electronic viewfinder, a tilting screen, and 4K video recording. It takes SD and Memory Stick media.
The A99 II suits professional portrait, landscape and reportage users invested in A-mount glass who want high resolution, fast hybrid autofocus and in-body stabilisation in a weather-sealed body. The electronic finder previews exposure and depth of field, while the translucent mirror keeps autofocus active through bursts and video.
On the used market, check the shutter count against its rated life for a body likely to have seen heavy use, and inspect the fixed translucent mirror for dust or marks since it cannot be cleaned as freely as a conventional mirror. Examine the 42MP sensor for dust, test the EVF and tilting screen for dead pixels and hinge play, and confirm the doors and hot-shoe. Verify five-axis IBIS operation without excess rattle; NP-FM500H batteries remain available aftermarket.