Cameras only give a sharper picture in bright light because this allows you to reduce the aperture size. The image is not sharper if you increase the shutter sp

Cameras only give a sharper picture in bright light because this allows you to reduce the aperture size. The image is not sharper if you increase the shutter speed instead of reducing the aperture. This is basic physics. Bright light is not magical. Squinting your eyes is a very poor approximation to what your irises are doing. The light collimation is not reduced uniformly in every axis and your eyelashes partially obscure the light.