In my quest to eliminate fog of war, I found something even better: field of view. Unlike max zoom, field of view does not increase the amount of fog on the screen. Simply change line 21 in config.txt to the field of view distance you want, and you will be able to see much farther without having to deal with the fog:
21) Your field of view. Unlike Max Zoom, this will increase your view distance without increasing the amount of fog on the screen. Because of this, I would highly recommend using this setting over max zoom. Please see the [Safety] section to avoid detection.