Buell died Monday in Sunnyvale, California, where his daughter lived, after battling pneumonia, his daughter Barbara Buell said in an email. “Hal pushed us an extra step,” Adams said in an internal AP newsletter at the time of Buell's retirement in 1997. Buell implemented the transition from a chemical darkroom where film was developed to digital transmission and digital news cameras. He also helped create AP’s digital photo archive in 1997. Buell is survived by his daughter, Barbara Buell, and her husband, Thomas Radcliffe, as well as two grandchildren and a great-grandson.

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