i have some NIGHT OWL OPTICS( NOFF EXPLORER ) binoculars with biult in infra-red, and you can see a fox at 70yds, ive also got an infra-red lense that fits onto my lightforce 170 striker and it is awesome, when you use them together you can see a rabbit at 100yds a fox at 200yds and a man at 400yds,1st time i used them there was 3 of us, me with the infra-red, a lad with a normal lamp an a lad with a shotgun, i squeaked the fox right in to about 15yds, then i tappad my mates foot and he switched on his lamp and the third guy shot it, very effective. the binoculars were £425 and the lense was