for me it's a no no no. my local temps hit 100+ in the summer so 140+ inside a parked car.

That being said, I have a pair or throw away pocket bushnells that have been in my center console for years now and they work fine for a quick glance from the truck. They suck compared to my swarovski work and my swarovski hunting binos. Although those are better built, I would never leave the swaro's in the car for many reasons.