Sony a7RII Review (Part 2): IQ Re-test, Overheating, Moving Subjects, S-Log2

In Part 2 of our Sony a7R II review, we provide a 1-minute summary for the impatient, and then dig deep, re-testing detail, noise, and image quality at the request of a subscriber. We test whether it overheats when recording 4k video--and it does--but only in specific circumstances. We test moving subjects to see if it's capable of being a sports & action camera (for both stills and video). We also test the dynamic range while recording video by recording in S-Log2 and heavily recovering the shadows.
Finally, I answer questions from subscribers after our first review.
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STARTER CAMERAS:
Basic Starter Camera ($280 used at Amazon): Canon T3
Better Starter Camera ($500 at Amazon): Nikon D5300
Better Travel Camera ($500 at Amazon): Olympus OM-D E-M10 Mark II
LANDSCAPE CAMERAS:
Good ($550 at Amazon): Sony a6000
Better ($1,400) at Amazon: Nikon D5500 & Sigma 18-35mm f/1.8
Best ($3,150) at Amazon: Pentax K-1 & Pentax 24-70 f/2.8
PORTRAIT CAMERAS:
Beginner ($950 at Amazon): Canon T6i & Canon 50mm f/1.8
Better ($3,000 at Amazon): Nikon D610 & Tamron 70-200 f/2.8
Best ($5,300) at Amazon: Nikon D810 & Nikon 70-200 f/2.8E
WILDLIFE CAMERAS:
Starter ($1,100 at Amazon): Canon 7D & Canon 400mm f/5.6
Great ($3,200 at Amazon): Nikon D500 & Nikon 200-500 f/5.6
VIDEO CAMERAS:
Beginner ($500 at Amazon): Panasonic G7 & Panasonic 14-42mm
Better ($1,400 at Amazon): Panasonic GH4 & Panasonic 14-140 f/3.5-5.6
Best ($4,300 at Amazon): Panasonic GH5 & Metabones Speed Booster XL & Sigma 18-35 f/1.8 & Sigma 50-100 f/1.8
DRONES:
Beginner ($400 at Amazon): DJI Phantom 3
Travel ($1,000 at Amazon): DJI Mavic Pro
Better Image Quality ($1,500 at Amazon): DJI Phantom 4 Pro