Other brands have similar tools that go by a different name. The setting is on most Canon cameras launched after 2008, including Canon DSLRs. The difference is often subtle, but most visible in the darkest areas of the image. Once you turn it on, you don’t have to make the adjustments. ALO is in-camera processing that the camera does automatically. It adjusts a JPEG photo to bring out more detail in tricky lighting. What Is the Canon Auto Lighting Optimizer?Ĭanon’s Auto Lighting Optimizer is a camera setting.