Related Clues:

• Nikon offering
• Photog's choice
• Brownie's eye?
• Beam splitter
• Optical device
• Piece of cut crystal, perhaps
• Fisheye or zoom
• You'll see right through it
• Monocle, basically
• Camera feature
• Camera essential
• Something to shoot through
• Fisheye or contact
• Imitator
• Eyesight enhancer