1. Having three different lenses with different focal lengths

Encyclopedia: Trifocal

• bowling ball
• bowling equipment
• bowling green
• bowling league
• bowling pin
• bowling score
• bowling shoe
• bowls
• bowman
• Bowman's capsule
• bowse
• bowser
• bowshot
• bowsprit
• bowstring
• bowstring hemp
• bowtie
• bowtie pasta
• bowyer
• box
• box beam
• box calf
• box camera
• box coat
• box elder