a person or thing that finds.

Photography .

a range finder.

Also called viewfinder. a camera part or attachment enabling a photographer to determine what will be included in the picture.

Astronomy . a small, wide-angled telescope attached to a larger one for locating objects to be studied.

a person or firm that acts as agent in initiating a business transaction.

noun

loser , owner , stray

noun

discoverer , spotter , acquirer , appropriator , claimant , search party , sight , telescopic sight , bombsight , gunsight , homing device , viewfinder , periscope , radar , sonar