Why do camera lenses need to focus on something? Why can't they just render an image in which everything is clear or maybe only some types of lenses work like that? -
![A Blogger Takes Himself on Camera. Focus on His Camera on a Tripod. Gesture of Greeting Stock Image - Image of camera, education: 184340157 A Blogger Takes Himself on Camera. Focus on His Camera on a Tripod. Gesture of Greeting Stock Image - Image of camera, education: 184340157](https://thumbs.dreamstime.com/b/blogger-takes-himself-camera-focus-his-tripod-gesture-greeting-everything-else-blurry-184340157.jpg)
A Blogger Takes Himself on Camera. Focus on His Camera on a Tripod. Gesture of Greeting Stock Image - Image of camera, education: 184340157
Cameras focus on one point, with everything in front or behind being progressively out of focus. Can a digital camera be programmed to take a series of shots at varying depths so
![A man travels and takes off everything seen on the action camera . Focus on action camera. Winter Stock Photo - Alamy A man travels and takes off everything seen on the action camera . Focus on action camera. Winter Stock Photo - Alamy](https://c8.alamy.com/comp/2B77F5E/a-man-travels-and-takes-off-everything-seen-on-the-action-camera-focus-on-action-camera-winter-2B77F5E.jpg)
A man travels and takes off everything seen on the action camera . Focus on action camera. Winter Stock Photo - Alamy
![A man travels and takes off everything seen on the action camera .Focus on action camera.Winter Stock Photo - Alamy A man travels and takes off everything seen on the action camera .Focus on action camera.Winter Stock Photo - Alamy](https://c8.alamy.com/comp/2B5XBDC/a-man-travels-and-takes-off-everything-seen-on-the-action-camera-focus-on-action-camerawinter-2B5XBDC.jpg)