How to zoom viev in minecraft?

I'v seen many youtubers doing it, like they are pressing something and the viev zooms a bit and then its gets back normal again. What's the button or is it a mod?

Sicker

There's a command you can use to zoom in a YouTuber called Captain Sparkles made a bow with a zoom function on it

Now what you see in videos is a mod

Link To Mod: http://www.5minecraft.net/…

Dustin

Ya can't sucka!

Josh