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The Sony α7R III (model ILCE-7RM3) is a
full-frame mirrorless interchangeable-lens camera A mirrorless camera (sometimes referred to as a mirrorless interchangeable-lens camera (MILC) or digital single-lens mirrorless (DSLM)) is a digital camera which, in contrast to DSLRs, does not use a mirror in order to ensure that the image ...
manufactured by
Sony is a Japanese multinational conglomerate (company), conglomerate headquartered at Sony City in Minato, Tokyo, Japan. The Sony Group encompasses various businesses, including Sony Corporation (electronics), Sony Semiconductor Solutions (i ...
. It was announced on 25 October 2017 as the successor to the Sony α7R II launched two years prior. The camera shares many features with the α7R II, including the same 42.2 MP resolution for still photography. It was superseded by the
Sony α7R IV The Sony α7R IV (model ILCE-7RM4) is a full-frame mirrorless interchangeable-lens camera manufactured by Sony. It was announced on 16 July 2019 as the successor to the Sony α7R III launched two years prior. Image gallery File:Sony Alpha 7R I ...
in July 2019. The camera does not include an optical low-pass (anti-aliasing) filter.


Improvements over α7R II

Several improvements were made compared to the α7R II, including the following: * Improved dynamic range due to lower noise in sensor readout * 425 contrast-detect
autofocus An autofocus (AF) optical system uses a sensor, a control system and a motor to focus on an automatically or manually selected point or area. An electronic rangefinder has a display instead of the motor; the adjustment of the optical system h ...
points, up from 25 in the α7R II * Altered button layout reminiscent of the α9 * Improved autofocus performance * Improved battery life due to larger battery * Dual
SD card Secure Digital (SD) is a proprietary, non-volatile, flash memory card format developed by the SD Association (SDA). Owing to their compact size, SD cards have been widely adopted in a variety of portable consumer electronics, including dig ...
slots, compared to a single slot in the α7R II. However, the slots do not exactly match. One is an SD slot (UHS-I/II compliant), the other is a dual SD (UHS-I compliant) and Sony
Memory Stick The Memory Stick is a removable flash memory, flash memory card format, originally launched by Sony in late 1998. In addition to the original Memory Stick, this family includes the Memory Stick PRO, a revision that allows greater maximum storage ...
Duo slot. * Improved shutter mechanism to reduce shutter-induced shake * Pixel shift multi-shot mode that combines exposures taken on each subpixel of the
Bayer filter A Bayer filter mosaic is a color filter array (CFA) for arranging RGB color model, RGB color filters on a square grid of photosensors. Its particular arrangement of color filters is used in most single-chip digital image sensors used in digit ...
, improving overall image quality


See also

* Comparison of Sony α7 cameras * Sony α9 * Exmor R


References

https://www.sony.com/electronics/interchangeable-lens-cameras/ilce-7rm3a/specifications


External links


Sony α7R III
DPReview
Sony α7R III compared with Nikon D850
DPReview {{Sony MILC cameras α7R III Cameras introduced in 2017 Full-frame mirrorless interchangeable lens cameras