Perhaps its the gyros "spooling up"
It isn't the loudest noise in the world......it is rather faint.
However, I don't want this to be the begining of something much more costly down the road.
I realize this isn't a Pro lens, but I can't afford nor do I want to cary around a $1,000 lens <<For now!
<Perhaps Santa will take notice.
Well I keep a lookout for you 55-250 Canon Lens users!