CVar cameraDistanceMax

Sets the maximum distance which you can zoom out to.

Default Setting

 * 15

Possible Settings

 * 0 - 50 :This CVar accepts a range of settings from 0 - 50

Changing this setting
In-game, type the following /console cameraDistanceMax setting

Alternatively, you can exit wow, open the Config-cache.wtf file, and add the following line: SET cameraDistanceMax setting