Related Clues:

• Oculist's piece
• Camera component
• Fisheye ___
• Source of a parting shot?
• Fish-eye, e.g.
• Tripod topper
• It helps keep you focused
• Copier part
• Shutterbug necessity
• Funt prop
• Film, in Variety-speak
• Magnifying glass
• Something to see through
• Periscope part
• Tourist's prop