dobsonian fuzzy cold night?

[jakevn]

hey guys i have just taken my bintel dobsonian 8inch telescope outside, looking at Jupiter and it is pretty fuzzy,

Usually i leave my scope out for 15-20mins to get to outside temp.
is this normal to be fuzzy until it is about outside temp??
thank you

[Atmos]

That would be pretty normal, as the mirror is cooling down it is radiating heat and this will fuzzy up your views.