I guess the answer is 'it depends on the temperature and for how long' ultimately; I've received new electronic gear in the middle of
nasty Canadian deep freezes many times and have let them acclimatize for 24 hours (3 days on an unheated truck at -35C -> -40C makes for a frozen-to-the-core package...we are talking 'none....more.....frozen' here heh).
Both my newest Suhr and AX8 arrived in the dead of a very cold winter after being on a truck for days. Salesguy at the Suhr store said "you have to absolutely let it sit for 24 hours,
or else"....when it arrived there were printouts, in large bold lettering, attached to all sides of the box that read "Do not open for 24-hours,
or else" lol....they really meant it.
I let the AX8 sit for a whole day before I plugged it in...and my CLR's....on and on....Canadian winters really suck. It does become a test of one's patience staring at awesome new goodies for a whole day before you can indulge, but ya gotta do what ya gotta do...
sat in 29F degrees for about 8 hours
Ahhhhh that's not too bad at all lol!! But I myself would leave it for at
least 16 hours, maybe open the outer box after 8 hours...let it warm up slowly.
Where you can see issues is if you take an item from a cold low humidity environment, into a very hot and humid environment.
Yea on the days I feel like getting out at -20C to take pictures outside I put my camera in a big bag and seal it before I bring it into the house and let it sit for a few hours to prevent condensation forming. Condensation is always a concern anytime you go from cold to warm...I always default to 'safe-mode' and let things warm up slowly.