Sony's long-zoom 1-inch bridge — the RX10 IV, fixed zoom, phase-detect AF, EVF, 4K video, 2017.
The Sony RX10 IV is a fixed-lens bridge camera announced in 2017, the fourth model in Sony's Cyber-shot RX10 line. It extended the all-in-one concept with a longer zoom range and faster autofocus than earlier models, aimed at travel, wildlife and general users wanting wide-to-long reach in one body.
It is a fixed-lens bridge camera with no interchangeable mount and no reflex mirror, so it has no lens mount and takes no removable lenses. It combines a 1-inch stacked sensor with a long fixed zoom reaching well into telephoto, and it adds phase-detection autofocus for faster, more reliable tracking than the earlier RX10 models. It uses an electronic viewfinder and tilting screen, has optical stabilisation in the lens, records 4K video, and takes SD and Memory Stick media.
The RX10 IV suits travel, documentary, wildlife and general photographers who want a single camera spanning wide to long telephoto with quick autofocus. Its extended zoom, hybrid AF, electronic finder and 4K video make it a capable do-everything body, trading the image quality of larger sensors for reach, speed and convenience.
On the used market, check the shutter count where readable, inspect the fixed lens for dust, fungus and zoom-mechanism play over its long range, and test the EVF and tilting screen for dead pixels. Confirm the card and battery doors latch, check the hot-shoe and lens stabilisation, and inspect the grip rubber. The NP-FW50 battery remains widely available aftermarket, keeping running costs straightforward.