Introduction

The five-year gap between the launch of the a7S II and the announcement of the a7S III had some people wondering whether Sony had given up on the idea of a video-focused a7 model. The enhanced video capability of the core a7 line made that seem plausible (the a7 III does many of the things the a7S II did).
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https://www.dpreview.com/articles/1661784063/sony-a7s-ii-vs-a7s-iii-what-s-new-and-does-it-matter