Field of View

Field of view is the portion of a scene that appears inside the frame, measured across the width and height of the image. It is also called angle of view. A wide field includes more of the surroundings; a narrow field shows less area but magnifies the subject. Focal length and sensor size are the main factors that set the field of view for a given camera setup.

Focal length is a property of the lens, measured in millimeters. Field of view is the visible result on the sensor: how much of the scene the photograph captures. Shorter focal lengths generally produce wider fields of view, and longer focal lengths produce narrower ones. The same focal length can yield different fields of view on sensors of different sizes.

Yes. A smaller sensor crops the image projected by the lens, so less of the scene fits in the frame than on a larger sensor with the same lens. This is why photographers talk about crop factor when comparing APS-C, full-frame, and medium-format bodies. Sensor size does not change the lens focal length, but it does change the effective coverage.

A wide field of view fits large scenes into one frame: landscapes, city skylines, tight interiors, and group photos. Wide views also exaggerate distance between near and far objects, which can add depth to composition. Photographers accept some edge distortion with very wide lenses as a tradeoff for fitting more of the scene without stitching a panorama.

A narrow field of view magnifies distant subjects and simplifies busy backgrounds. Sports, wildlife, and concert photographers use telephoto lenses to bring far action close. Portraits at moderate telephoto focal lengths can separate the subject from the background with shallow depth of field. A narrow view reduces clutter by showing only a small slice of the scene.

Lens specifications often list diagonal angle of view in degrees. A 24mm lens on full frame might list around 84 degrees diagonal; a 200mm lens might list about 12 degrees. Horizontal and vertical angles are sometimes listed separately. Phone and action camera makers also publish field-of-view figures for each built-in lens or mode.

Moving closer to or farther from the subject changes how much of the scene fills the frame, but that is a framing change, not a true change in optical field of view. Cropping in editing narrows what is visible in the final image. Zoom lenses change field of view by adjusting focal length within the zoom range. Sensor crop modes also reduce the recorded field of view.

Angle of view is another name for field of view. It describes the angular span, in degrees, that a lens and sensor combination can see. Diagonal angle of view is the most common spec because it covers the full frame corner to corner. Wider angles mean more scene coverage; smaller angles mean a tighter, more magnified view.

Crop factor compares a sensor's size to a full-frame reference. Multiplying the lens focal length by the crop factor gives an equivalent focal length that describes the field of view on full frame. A 24mm lens on a 1.5x crop sensor shows coverage similar to a 36mm lens on full frame. Crop factor helps compare how wide or tight different camera and lens pairs will look.

Modern phones ship with multiple lenses or sensor crops, each with a different focal length and therefore a different field of view. The standard lens approximates a normal perspective for everyday shots. The ultrawide lens captures a much broader angle for landscapes, architecture, and tight spaces. Listing the angles helps buyers compare how much each lens can fit in the frame.