Since the late 1970s he has worked for some of the biggest acts in rock and heavy metal, including Led Zeppelin, AC/DC, Black Sabbath, The Who, Kiss, Metallica, Iron Maiden, Judas Priest, Van Halen, Def Leppard and many others.
Disillusioned with the school's preoccupation with Modernism, he started shooting music photography, bringing his camera along to rock concerts, which he could do with no restrictions at the time.
He has toured with many bands, including Metallica, Iron Maiden, Status Quo, Def Leppard, The Who, AC/DC, Led Zeppelin, Jam, Blondie, Mötley Crüe, Van Halen, Aerosmith, The Black Crowes, Ozzy Osbourne, Kiss, Soundgarden, Queens of the Stone Age and The Mars Volta.
Halfin began his career working for Sounds magazine in the 1970s, shooting various artists on the punk scene including The Clash, The Jam, The Sex Pistols, 999 and The Adverts.
After linking up with writers Geoff Barton and Peter Makowski, Halfin moved on to working mainly in the US with bands such as Iron Maiden, AC/DC, Bon Jovi, UFO, Rush, Journey, Aerosmith and Black Sabbath.