Related Clues:

• Copier part
• Injection selection
• Film, in Variety-speak
• Magnifying glass
• Something to see through
• Periscope part
• You can get a shot in with it
• Eye piece
• It's see-through
• It helps keep one focused
• Lorgnette part
• Contact, for one
• Something found in specs?
• It helps you focus
• Tool for 64-Across