Symbol 1954 from ISO 7000 - Title/Meaning: Exposure adjustment 
Function/description: To identify the control for exposure adjustment and/or to identify the related display panel indicator.
Own work using: iso.org/obp/graphics/grs/ede7c942-e72e-45e4-a27c-2746cad91394 200.png
Vectorization:  Mrmw