File:Focal-length.svg · Wikimedia Commons · See Wikimedia Commons
ความยาวโฟกัส
Sign in to savemeasure of how strongly an optical system converges or diverges light
AI overview
Focal length measures how strongly a lens or mirror bends light rays to focus them at a point. It matters because it determines what a camera or telescope can see—shorter focal lengths capture a wider view, while longer ones magnify distant objects.
AI-generated from the Wikipedia summary — may contain errors.
Wikidata facts
- Subclass of
- physical quantity
- Image
- Focal-length.svg
Show 5 more facts
- studied by
- optics
- Commons category
- Focal length
- described by source
- Nordisk familjebok
- different from
- depth of focus
- on focus list of Wikimedia project
- Wikipedia:Vital articles/Level/4
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