I have just got mine and been out once with it.still early days for me.
Its mounted on fac Daystate and scored one bunny so far.
I would say good for foxes upto 100m.
It can be fitted with a doubler- look on nightvisionuk. With doubler it requires added light also same forum 501b or t20.
CORRECTION-nightvisionforumuk, look for marky610 on youtube also.
The Ranger pro is barely any different to the standard one and definitely not worth the extra. The Ranger was one of the first digital spotters about. All will do foxing distances thanks to the advances in ir led technology the only real difference between them is the eye piece. I like the look of the new Hawke one, specs look good for the price and I get my hands on one on Monday. Pulsar do a whole range but I've never got to play with one. Then theres the Bresser/Newton (same thing), cheap as chips, still works out to foxing range with added ir but the eyepiece is primitive. Then theres the Armasight Prime, the list goes on and on.
I'm trying to put together a selection of the digital spotters out there to do a comparision video.