Why is the focus frame red when pressing the shutter button halfway down?
Focusing succeeds when the focus frame is green when pressing the shutter button halfway down. Focusing fails when the frame is red. Common causes for focusing failures include:
The subject is too close to the camera.
The shooting environment is too dark.
The focus point is on an area with no contrast such as a white wall or a solid color spot. Please manually select a new area with bigger contrast and try focus again.
When the focus frame is red, release the shutter button and adjust the focal point position and then retry.