binoculars
cut
discover
discovery
distance
enlargement
equipment
exploration
eye
field
flashlight
focus
glass
instrument
isolated
knife
led
lens
looking
magnification
magnify
navigation
object
observation
observe
optical
optics
outfit
portable
scrutiny
shadowing
sight
spyglass
spying
still
strap
supervision
surveillance
telescope
view
vision
visual
watch
zoom