Related Clues:

• Double-arc shape, in geometry
• Shutterbug's purchase
• Specs component
• Knows the plan of attack
• Camera-bag item
• Microscope attachment
• Word with telephoto or zoom
• An accomplice to, as a plot
• Optometric object
• Kodak's eye
• Magnifier
• Monocle, for one
• Spyglass part
• Monocle piece
• Wide-angle or zoom