Concert photography operates under specific constraints: low and rapidly changing light, a no-flash policy in most professional venues, a subject that moves unpredictably, and typically a three-song access window before photographers are removed from the pit. The Sigma 56mm f/1.4 DC DN Contemporary — available for Fuji X-mount and Sony APS-C — is a 84mm-equivalent fast prime at a price point that does not make pit photography financially precarious if something goes wrong.