The longest photographic negative measures 39.54 m (129 ft 8.69 in) in length and was created by Esteban Pastorino Diaz (Spain) using a custom-built panoramic slit camera on 13 June 2010. The negative is a panorama of major streets in Buenos Aries, Argentina, captured by the slit camera while mounted on the roof of a moving car.
Please note: Comments below may relate to previous holders of this record.