How to focus SLR accurately?

Take Nikon SLR as an example. The precise focusing method of SLR is:

1, single area focusing. Use the arrow keys at the back to select a point as the fixed focus area, and the focus point in the viewfinder will be highlighted when selecting.

2. It is best to use the central focus, because the central focus is mostly a sensitive cross focus.

3. Focus on the subject first, and half pressing the shutter will also highlight the focus. The circular focus indicator below will light up to indicate focus. At this time, accurate focusing can be ensured without releasing the shutter.

Single-lens reflex camera, also known as SLR camera, refers to a camera that uses a single lens, through which light shines on the reflector and takes a view through reflection. The so-called "single lens" means that the photographic exposure light path and the framing light path * * * use one lens, unlike the paraxial camera or the double-reflex camera, the framing light path has an independent lens. "Reflection" means that the plane mirror in the camera separates the two optical paths. The first SLR camera was developed by 1909. Since 1970s, this technology has been widely used, and SLR cameras have become the new favorites of senior photographers and professional photographers.