You can find all Black Friday deals on those special pages at BHphoto, Adorama and Amazon.
Sony:
You can find all the deals on those general pages at BHphoto, Adorama and Amazon. A special mention goes to the A7rIV which got a $500 off (and free tidbits) at at BHphoto, Adorama and Amazon.
Tamron:
Save big on FE and E lenses at BHphoto, Adorama and Amazon.
Sigma:
Save big on FE and E lenses at BHphoto, Adorama and Amazon.
Laowa:
Save big on FE and E lenses at BHphoto, Adorama and Amazon.
SLRmagic:
Save big on FE and E lenses at BHphoto, Adorama and Amazon.
Apple:
Save big on Apple gear at BHphoto, Adorama and Amazon.
Adobe:
There is a big new Black Friday deal at Adobe US (Click here). But a similar deal also runs at Adobe Germany, Adobe UK, and other European countries.
Luminar:
Skylum launched a new Black Friday deal on the current Luminar and future NEO software (Click here)