The Sony a7 III is the company's cheapest full-frame mirrorless camera -- but that doesn't mean the camera is lacking features. Packing a newly developed sensor and fast speeds, even the entry to the third generation in the A7 series is impressive.
While the 24.2-megapixel full-frame sensor has virtually the same megapixel count as the earlier a7 II, Sony has redesigned the sensor with a backlit design. Sony says this change allows the camera to capture a wider dynamic range and more accurate color than the predecessor, along with allowing for a wider ISO range.
Upgrading to the BIONZ X processor allows the camera to process data nearly twice as fast, doubling the older sibling's burst speed to 10 fps (8 fps if you want live view). That fast performance is paired with a hybrid autofocus system that's the same as in the super-speedy Sony a9, with 693 phase detection points and 425 contrast detection. Eye detection autofocus also improved on this model. Sony also built-in a five-axis stabilization system and 4K video at 30 fps.
All those features are wrapped up in a sealed magnesium alloy. Dual SD card slots are included. Both an electronic viewfinder and a tilting touchscreen can help compose the shots. Sony also managed to build in a much longer battery life, negating some of the negatives from the earliest models in the series.
Body-only, the Sony a7 III retails for $2,000, a $1,200 price drop from the higher-resolution a7R III, making the camera a good entry point into the Sony series. If you don't need the 40+ megapixel resolution of the a7R III or the 20 fps speed of the a9, the Sony a7 III looks like a good buy.