Sony A7rV Preorders:
In US at BHphoto , Amazon , Adorama , FocusCamera , BeachCamera , Buydig .
In EU at Fotokoch , Amazon EU , FotoErhardt , Calumet DE , WexUK . ParkCameras UK .
In Australia at CameraPro , Camerahouse , Sony .
A full Sony A7R V vs Sony A7R IV vs Canon R5 vs Nikon Z7 II spec comparison can be seen on that special BHphoto page .
And here is the comparison between Sony cameras (Click on it to enlarge the image):
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