Related Clues:

• Loupe, essentially
• Zoom or contact
• One swelling
• Hubble part
• Pince-nez component
• Double-arc shape, in geometry
• Astronomer's instrument
• Shutterbug's purchase
• Specs component
• Camera-bag item
• Microscope attachment
• Word with telephoto or zoom
• Optometric object
• Kodak's eye
• Optical instrument