adventure
aiming
army
background
battlefield
binocular
binoculars
black
circle
commando
crosshair
discovery
equipment
expedition
exploration
explorer
finder
follow
frame
front
glass
hunting
instrument
investigation
isolated
lens
look
magnifying
military
object
observe
open
optical
range
researcher
retro
search
shooter
sight
sniper
spy
surveillance
target
telescopic
view
viewfinder
vision
watch
zoom