Did The Beatles use guitar capos?

Beatles go 'capo-crazy' on Rubber Soul

A capo raises the pitch of stringed instruments including guitars and ukuleles. They are generally used to either make a chord progression easier to play or to match the vocal range of a singer. Famously Cilla Black failed her first audition for Brian Epstein because the The Beatles backed her in a lower key than she could manage.

The three Beatle guitarists were familiar with capos from an early stage - Buddy Holly often played with one. It has been speculated that John uses one on 'You've Got to Hide Your Love Away' on Beatles For Sale to channel Bob Dylan. In an era without YouTube tutorials to encourage accurate copying, the capo offered an alternative route to a distinctive sound.

Going Capo crazy on Rubber Soul

Rubber Soul marks a departure point for The Beatles, where they experiment with creating a new more musically complex sound. One of the tools they use heavily is the capo - both John and George use it on the 2nd fret on Norwegian Wood, while John goes up to the 8th for Girl. 

George would be the guitarist who used the capo most heavily, usually on the 7th but dippin down to the 1st for I'm Looking Through You. 

Even Paul seemed to join the capo party - the photo suggest he is playing C on his bass with the 5th capoed. Later he suggested it was a an (unsuccessful) experiment he tried with Michelle.