When I'm in the manual focus mode, I find that the focus light (the red blinking light) sometimes still comes on before it takes a photo. Why is this? I thought the purpose of the light is to illuminate the scene for automatically focusing, so it shouldn't be needed in manual focus mode.
I find this distracting, and draws unwanted attention to myself.
This is on the Sony NEX-5R, in aperture priority mode, using a 2-second remote shutter release.
Is the camera trying to measure the light to figure out what shutter speed to use? But in that case, illuminating the scene will change the very attribute it's trying to measure.