1. Having three different lenses with different focal lengths

Encyclopedia: Trifocal

• skinheads
• skink
• skinless
• skinned
• skinner
• Skinnerian
• skinniness
• skinny
• skinny-dip
• skinny-dipper
• skint
• skintight
• skip
• skip distance
• skip over
• skip rope
• skip town
• skip-bomb
• skipjack
• skipjack tuna
• skipper
• skipping rope
• skirl
• skirmish
• skirmisher