Time-lapse of a blue, cloudy sky with the top of a fir tree in the foreground and Sofia city defocused in the background

air defocused atmosphere city fir tree europe sofia bulgaria foreground tree copy space background blue blue sky bright bright blue sky clear climate cloud clouds cloudscape cloudscape timelapse cloudy color day daylight dramatic environment pine footage heaven high landscape light light with clouds sky line sunlight sunny time lapse weather 4k video beautiful countryside photography scenic season view cityscape skyline blurred