Sony’s Xperia 1 and 5 Mark III introduce variable optical zoom (but that's not what we're excited about): Digital Photography Review
Sony Xperia 5 III
Sony Xperia 5 III review
Sony’s Xperia 1 and 5 Mark III introduce variable optical zoom (but that's not what we're excited about): Digital Photography Review
Sony Xperia 5 III review: A small phone, with excellent battery life
Sony Xperia 5 III
Sony Xperia 5 III review
Sony Xperia 5 III specs
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In my opinion, a smartphone is not suited for serious photography.
Sony won't be adding the Video Pro app to the Xperia 1 III or 5 III, which is a shame.
Sony phones have always been lousy indoors and in low light, so I hope they address that.
There are physical buttons on the side of the phone, which can be used to lock and unlock the screen, adjust the volume and if you have the native camera app open to work as a shutter release button.
Alternatively you can also pinch to zoom in and out digitally.