f/2.8 Mark II zoom battle: Sony vs Sigma Vs Tamron 24-70 / 28-75mm comparison

Here are the three Mark II / G2 full-frame fast standard zoom lenses currently available for Sony E-mount cameras (the Sigma lens is also available on L-mount, and the Tamron lens, also on Nikon Z-mount).

Full reviews with further details, and affiliate links (thanks for your support!):

Sony FE 24-70mm f/2.8 GM II:
   • Sony FE 24-70mm f/2.8 GM II lens revi...  
https://geni.us/Sony2470GMII

Sigma 24-70mm f/2.8 DG DN 'Art' II:
   • Sigma 24-70mm f/2.8 DG DN 'Art' II le...  

Tamron 28-75mm f/2.8 G2:
   • Tamron 28-75mm f/2.8 Di III VXD G2 le...  
https://geni.us/Tamron2875G2

All pictures taken by me on a Sony a7R III camera.

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Equipment I use for making these reviews and other videos:
Equipment I use to make my videos (Amazon affiliate links):
Canon EOS R5: https://geni.us/CanonEOSR5Body
Canon EF-RF Adaptor: https://geni.us/CanonEFtoRF
Sigma 50mm f/1.4 'Art': https://geni.us/Sigma50mm14Art
Canon RF 35mm f/1.8 IS STM: https://geni.us/CanonRF35mm18Macro
Marumi Fit and Slim CPL Filter: https://geni.us/MarumiFitSlim77
AudioTechnica AT2020USB+ Microphone: https://geni.us/AT2020USBPlusMic
Rode Smartlav+ Microphone: https://geni.us/RodeSmartLavalierPlus
Rode SC3 adapter: https://geni.us/RodeSC3MicAdaptor
Zoom H1n Recorder: https://geni.us/ZoomH1nMiniRecorder
DJI Mini 2 Drone: https://geni.us/DJIMini2FlyMore

Music:
'Opportunity Walks', Kevin MacLeod (incompetech.com)
Licensed under Creative Commons: By Attribution 3.0
http://creativecommons.org/licenses/b...