Photographer's Device for Viewing Negatives

This page is the CodyCross answer for the clue below from Water Park, Group 741, Puzzle 1 (Swimming Pools).

Question is: Photographer's Device for Viewing Negatives

and the answer is: LIGHTBOX

Word Meaning:

LIGHTBOX — A box containing a source of light and a white, translucent cover, used to view photographic transparencies.

Definitions from Wiktionary.