Related Clues:

• Cup's edge
• Word with "contact" or "concave"
• A lens fits in it
• Part of most eyeglasses
• "Telephoto" or "contact" ender
• Wheel edge
• Slam-dunk circle
• Peephole feature, often
• Hoop's hoop?
• Telephoto, for one
• Microscope must
• Crime center?
• Glass part
• It may change your perspective
• Camera element