"Sigma" can refer to;
These are photos from concerts where Sigma played, so they may be of other bands that played the concert as well.
Reading Festival 2022 Saturday Aug 27, 2022 Reading, England, United Kingdom Uploaded by Eva Ralley
Reading Festival 2022 Saturday Aug 27, 2022 Reading, England, United Kingdom Uploaded by Georgieehiggo
Reading Festival 2022 Aug 26 - 28, 2022 Reading, England, United Kingdom Uploaded by Beth Bowden
Reading Festival 2022 Aug 26 - 28, 2022 Reading, England, United Kingdom Uploaded by 10samc
Reading Festival 2022 Aug 26 - 28, 2022 Reading, England, United Kingdom Uploaded by Deliverybuoy
