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Why does a smaller aperture bring more of a photograph into focus?

Changing the aperture can change the range that appears acceptably sharp. With focal length, focus distance, and viewing conditions held comparable, a smaller opening generally increases depth of field, though the simple rule has limits.

4–5 min

Questions you could explore

  • Why is 'acceptably sharp' different from a single perfect focus distance?
  • What trade-offs appear when the aperture becomes very small?

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  • Canon EuropeAperture

    Canon explains aperture and depth of field, including comparison images; it is a manufacturer’s educational account, not a camera ranking.

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Arts and culture

How does a flat drawing make a corridor look deep?

Lines drawn on a flat page can suggest a hallway extending into the distance. In one-point perspective, receding edges relate to a vanishing point and a horizon, linking the drawing to a particular viewpoint.

3–5 min

How does a flat drawing make a corridor look deep?

Arts and culture3–5 minLines drawn on a flat page can suggest a hallway extending into the distance. In one-point perspective, receding edges relate to a vanishing point and a horizon, linking the drawing to a particular viewpoint.

Arts and culture

What can infrared reveal beneath a painting?

A finished painting can conceal decisions made before its visible surface took shape. Infrared imaging sometimes reveals earlier marks, but what appears depends on how the different materials interact with the light.

4–5 min

What can infrared reveal beneath a painting?

Arts and culture4–5 minA finished painting can conceal decisions made before its visible surface took shape. Infrared imaging sometimes reveals earlier marks, but what appears depends on how the different materials interact with the light.

Can a tradition be heritage without a building to preserve?

Arts and culture3–5 minA song, a craft skill, or a shared practice can be passed on without being fixed in stone. Intangible cultural heritage places importance on living knowledge and the communities that recognize and transmit it.

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