FCC published additional documents regarding the upcoming Pentax K-3 Mark III DSLR camera. FCC filing unveils the internals of the K-3 III. The front and top parts of the upcoming K-3 III APS-C DSLR without its outer shell. It shows the viewfinder pentaprism, top info display and the new shutter release.
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https://www.dailycameranews.com/2020/12/the-internals-of-the-upcoming-pentax-k-3-iii-flagship-aps-c-dslr/