hyperfocal distance

Thân thiện

A photographer sets the lens to the hyperfocal distance for a landscape shot.

Definition

Noun: - The distance in front of a lens that is focused at infinity beyond which all objects are well defined and clear: In photography and optics, the hyperfocal distance is the specific focus distance that maximizes the depth of field. When a lens is focused at this distance, everything from half this distance to infinity appears acceptably sharp in the image.

Usage

• The hyperfocal distance is a key concept for achieving maximum sharpness from the foreground to the background in landscape photography.
• It is calculated based on the lens's focal length, aperture (f-number), and an accepted standard for the "circle of confusion."
• To use it, a photographer sets the lens focus to the calculated hyperfocal distance, ensuring everything from half that distance to infinity is in focus.

Examples

• Noun:
  • To get the entire mountain range and the wildflowers in the foreground sharp, the photographer calculated and used the hyperfocal distance.
  • Understanding hyperfocal distance is essential for mastering deep-focus cinematography.
  • The app provides a quick calculation of the hyperfocal distance for your camera and lens settings.

Advanced Usage

• "To focus at the hyperfocal distance": This is the primary action. It means to manually set your lens's focus ring to the calculated distance.
  • For this shot, you should focus at the hyperfocal distance to keep both the fence and the horizon sharp.
• The concept is often used with depth of field scales found on some manual-focus lenses, where the photographer aligns the infinity mark with the chosen aperture marking to automatically set the hyperfocal distance.

Variants and Related Words

• Hyperfocal (adj): Pertaining to the hyperfocal distance.
  • The hyperfocal setting is marked on the lens's depth of field scale.
• Depth of Field (DOF) (n): The range of distance within a photo that appears acceptably sharp. The hyperfocal distance is used to maximize the depth of field.
• Circle of Confusion (n): A technical parameter used in the calculation of depth of field and hyperfocal distance, relating to the perceived sharpness of a point of light.

Synonyms

• Optimal focus distance for depth of field: A descriptive synonym emphasizing its purpose.
• Infinity focus point for maximum depth of field: Another descriptive term highlighting the relationship between focusing at infinity and achieving deep focus.

Related Phrases

• Hyperfocal focusing: The technique of using the hyperfocal distance.
  • Hyperfocal focusing is a staple technique for landscape photographers.
• Set to hyperfocal: A common instruction meaning to adjust the lens focus to the hyperfocal distance.
  • Simply set to hyperfocal and your scene will be sharp from near to far.

Học thuật

Noun

1. the distance in front of a lens that is focused at infinity beyond which all objects are well defined and clear