About camera fov

The field of view (FOV) for a camera is typically calculated based on the focal length of the lens and the size of the camera sensor. The FOV is the extent of the observable scene that is captured by the camera.

The FOV can be calculated using the following formula:

FOV = 2 * arctan( d / (2 * f) )

where:

• FOV: the field of view angle in radians
• d: the diagonal size of the camera sensor
• f: the focal length of the lens

The diagonal size of the camera sensor can be calculated using the Pythagorean theorem, as follows:

d = sqrt( w^2 + h^2 )

where:

• w: the width of the camera sensor
• h: the height of the camera sensor

Note that the FOV angle calculated using the above formula is typically in radians. To convert it to degrees, you can multiply it by 180/π (approximately 57.3).

This is what Apple has declared for the Camera Spec on iPhone 13 & 13 Mini

Camera

• Dual 12MP camera system: Main and Ultra Wide cameras
• Main: ƒ/1.6 aperture
• Ultra Wide: ƒ/2.4 aperture and 120° field of view
• 2x optical zoom out
• Digital zoom up to 5x
• Portrait mode with advanced bokeh and Depth Control
• Portrait Lighting with six effects (Natural, Studio, Contour, Stage, Stage Mono, High‑Key Mono)
• Sensor‑shift optical image stabilisation (Main)
• Seven‑element lens (Main); five‑element lens (Ultra Wide)
• True Tone flash with Slow Sync
• Panorama (up to 63MP)
• Sapphire crystal lens cover
• 100% Focus Pixels (Main)
• Night mode
• Deep Fusion
• Smart HDR 4
• Photographic Styles
• Wide colour capture for photos and Live Photos
• Lens correction (Ultra Wide)
• Advanced red‑eye correction
• Auto image stabilisation
• Burst mode
• Photo geotagging
• Image formats captured: HEIF and JPEG