a7R II Review: vs 5DS-R, D810, GH4, a7 II & a7S

More detail and a correction in Part 2:    • Sony a7RII Review (Part 2): IQ Re-tes...  

We review the new Sony a7R II (on Amazon http://help.tc/a7rii) and its 4k video against the GH4 (on Amazon http://help.tc/gh4) and a7S (on Amazon http://help.tc/a7s) with an Atomos Shogun (on Amazon http://help.tc/shogun). We compare the a7R II's 42-megapixel sensor against the Canon 5DS-R (on Amazon http://help.tc/5dsr) and Nikon D810 (on Amazon http://help.tc/d810). We also test the improved autofocusing to see if it can match similarly priced DSLRs, using both native Sony lenses and Canon lenses adapted with the Metabones IV (on Amazon http://help.tc/mb4).

This is the first in a multi-part review, so if you have questions that you want to be answered in future reviews, let us know in the comments.

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STARTER CAMERAS:
Basic Starter Camera ($280 used at Amazon): Canon T3 http://help.tc/t3
Better Starter Camera ($500 at Amazon): Nikon D5300 http://help.tc/d5300
Better Travel Camera ($500 at Amazon): Olympus OM-D E-M10 Mark II http://help.tc/em10ii

LANDSCAPE CAMERAS:
Good ($550 at Amazon): Sony a6000 http://help.tc/a6000
Better ($1,400) at Amazon: Nikon D5500 http://help.tc/D5500 & Sigma 18-35mm f/1.8 http://help.tc/s35
Best ($3,150) at Amazon: Pentax K-1 http://help.tc/K1 & Pentax 24-70 f/2.8 http://help.tc/p24

PORTRAIT CAMERAS:
Beginner ($950 at Amazon): Canon T6i http://help.tc/t6i & Canon 50mm f/1.8 http://help.tc/c50
Better ($3,000 at Amazon): Nikon D610 http://help.tc/d610 & Tamron 70-200 f/2.8 http://help.tc/t200
Best ($5,300) at Amazon: Nikon D810 http://help.tc/d810 & Nikon 70-200 f/2.8E http://help.tc/n200e

WILDLIFE CAMERAS:
Starter ($1,100 at Amazon): Canon 7D http://help.tc/7D & Canon 400mm f/5.6 http://help.tc/c400
Great ($3,200 at Amazon): Nikon D500 http://help.tc/d500 & Nikon 200-500 f/5.6 http://help.tc/n500

VIDEO CAMERAS:
Beginner ($500 at Amazon): Panasonic G7 http://help.tc/g7 & Panasonic 14-42mm http://help.tc/p42
Better ($1,400 at Amazon): Panasonic GH4 http://amzn.to/2p5dAmD & Panasonic 14-140 f/3.5-5.6 http://help.tc/p140
Best ($4,300 at Amazon): Panasonic GH5 http://help.tc/gh5 & Metabones Speed Booster XL http://help.tc/mbxl & Sigma 18-35 f/1.8 http://help.tc/s35 & Sigma 50-100 f/1.8 http://help.tc/s100

DRONES:
Beginner ($400 at Amazon): DJI Phantom 3 http://help.tc/p3
Travel ($1,000 at Amazon): DJI Mavic Pro http://help.tc/Mavic
Better Image Quality ($1,500 at Amazon): DJI Phantom 4 Pro http://help.tc/p4p