The Sony a7 III is a 24MP full frame mirrorless camera that incorporates many of the features and improvements found in the a7R III. Primary among these are a BSI sensor, along with the larger capacity 'Z' battery, AF joystick and the company's impressive EyeAF feature.
The new Fujifilm X100F (MSRP $1,299) is the 4th edition, and it improves on the original concept in every way. By adding a new 24-megapixel X-trans APS-C sensor into a reinvented, improved body, Fuji continues the proud tradition it established six years ago.
Nikon's 2016 update to that camera, the D3400, has some small enhancements to bring it up to date, but nothing vital. It remains a great value -- fast with very good photo and video quality and a new kit lens optimized for shooting via the LCD -- but its weak wireless file transfer barely feels like a step up from nothing.
The Panasonic GH5S is a video-focused Micro Four Thirds camera built around what the company markets as a 10.2MP sensor. It's best understood as an even more video-centric variant of the GH5: it can shoot either DCI or UHD 4K footage natively (one capture pixel = one output pixel) at up to 60p.
The Canon EOS Rebel T7i / 800D is the latest incarnation of Canon's hugely popular mass-market range of DSLRs. This latest model is built around a 24MP sensor that uses Canon's Dual Pixel AF system to offer improved autofocus in live view and video (more on that later).