The new Sony A7 III just announced is unsurprisingly the third generation of the series and includes a number of improvements and innovations compared to it’s predecessors the A7 II and original A7.

The fact that the original A7 is still available to purchase new having been launched in 2013 shows just what a great base Sony had to work with when developing the A7 II and now the brand new A7 III.

The A7 III features a new 24mp BSI CMOS sensor with ‘evolved’ image processing , 10fps continuous shooting and 4K HDR video recording.

Maximum extended ISO now goes to a mind-boggling ISO 240,800 and there are 693 AF points.
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https://blog.parkcameras.com/2018/02/new-sony-a7-iii-just-announced-compared.html