Blurriness in photographs is primarily caused by:

Blurriness in photographs can occur for several reasons, but one of the primary causes is often related to the focus settings or issues with camera stability.

When objects are too far away, they can fall outside the lens's ability to focus correctly, resulting in images that appear blurry. However, this is typically more related to depth of field and how the focal point is set rather than solely due to distance.

Camera shake is a significant factor in inducing blur, particularly in low-light conditions or when using slow shutter speeds. If the camera moves during exposure, even slightly, it can create an overall blurry effect on the image. Similarly, wrong focus settings can lead to a lack of clarity if the camera is not focused on the intended subject, resulting in soft or out-of-focus images.

The notion of too much light might suggest that overexposure can affect image clarity, but it does not lead to blurriness in the same sense as the aforementioned factors. Understanding these distinctions helps clarify why incorrect focus settings, camera shake, and depth of field considerations are critical in achieving sharp photographs.