Hi, I am new to photography and I was trying to get some information about taking pictures during winter but couldn't find a source that seems reliable and complete. So I would like to ask people's opinions here: 1) For the camera itself, is it ok to go out and shoot when it is -10°C (14°F) or even -15°C (5°F)? 2) I heard that batteries don't like the cold weather. If I only have one battery, what should I do? 3) Is it ok to leave the camera on (sleep mode maybe) as I walk on the streets in the winter? 4) Any other tips? Thank you in advance!