Below you will find example sentences with "focal length". The examples show how this phrase is used in natural context and which words often surround it.

Focal Length in a sentence

Corpus data

  • Displayed example sentences: 20
  • Discovered as a combination around: length
  • Corpus frequency in the collocation scan: 16
  • Phrase length: 2 words
  • Average sentence length: 28.1 words

Words in this phrase

focal length

Meanings of words in this phrase

  • focal can mean: Belonging to, concerning, or located at a focus. Less frequent word
  • length can mean: The distance measured along the longest dimension of an object. Frequent word

Sentence profile

  • Phrase position: 3 start, 12 middle, 5 end
  • Sentence types: 20 statements, 0 questions, 0 exclamations

Usage patterns

These patterns show short text windows around the phrase in the example sentences:

of the focal length to the 2× a 24mm focal length and an 1× a longer focal length 1× a longer focal length is on 1× a longer focal length of a 1× as the focal length though it 1× by the focal length of the 1× by their focal length a converging 1×

Sentence openings and endings

Common sentence openings:

a newer 90mm 1× because the magnification 1× besides the variations 1× but the telephoto 1× close up when 1× for a background 1×

Common sentence endings:

2 5 times 1× a converging lens 1× cause greater magnification 1× diameter of aperture 1× introducing significant error 1× longer focal length 1×

Context words

These words often appear near this phrase in the example sentences:

lens 14× lenses 6× longer 5× light 5× aperture 5× diameter 5× objective 4× distance 4× ratio 4× eyepiece 3× magnification 2× divided 2×

Related phrases

total length average length

Phrases around this combination

Other phrases discovered around length:

total length 11× average length 9×

Just before it in the phrase index:

flying cars flying car fly fishing fly ball flu vaccine flu shot

Just after it in the phrase index:

focus solely focuses primarily folic acid folk dance folk festival folk music

Other phrases with the same pattern

Same ending:

total length average length

Corpus analysis

  • The phrase "focal length" has 2 words and usually appears in the middle in these examples. The average sentence has 28.1 words and is mostly made up of statements.
  • Around this phrase, patterns and context words such as of the focal length to the, a 24mm focal length and an, lens, lenses and longer stand out.
  • In the phrase index, this combination connects with total length, average length, total length and average length, linking the page to nearby combinations.

Example types with focal length

This selection groups the examples by length and sentence type, making usage of the full phrase easier to scan:

Short example sentences

Taken with just 250mm focal length for a field similar to binoculars. (12 words)

The 102mm objective lens and paired with the 660mm focal length is the perfect planet viewing setup. (17 words)

The lens has a 24mm focal length and an adjustable aperture from f/2.8 to f/11. (18 words)

Longer example sentences

The light is not focused to a point but forms an Airy disk having a central spot in the focal plane with radius to first null of : where λ is the wavelength of the light and N is the f-number (focal length divided by diameter) of the imaging optics. (50 words)

The length of the star trails is also governed by the lens focal length: with a wide angle such as I was using the stars would move a shorter distance across the frame than they would if I were more zoomed in. (42 words)

The focal ratio (f-number, the ratio of the focal length to the dish diameter) of typical parabolic antennas is 0.25 - 0.8, compared to 3 - 8 for parabolic mirrors used in optical systems such as telescopes. (38 words)

Example sentences (20)

Because the magnification of a telescope is equal to the focal length of the objective divided by the focal length of the eyepiece, smaller focal-length eyepieces cause greater magnification.

Lenses are characterized by their focal length : a converging lens has positive focal length, while a diverging lens has negative focal length.

The objective focuses an image of a distant object at its focal point which is adjusted to be at the focal point of an eyepiece of a much smaller focal length.

Close-up When the subject distance approaches the lens focal length, the focal length no longer is negligible, and the approximate formulas (11),(12) above cannot be used without introducing significant error.

For a background detail, the blur increases with focal length; for a foreground detail, the blur decreases with focal length.

Longer focal length lenses will pass less light through the same aperture diameter due to the greater distance the light has to travel; shorter focal length lenses will transmit more light through the same diameter of aperture.

The distance from this point to the lens is also known as the focal length, though it is negative with respect to the focal length of a converging lens.

The objective lens is essentially a magnifying glass and was designed with a very small focal length while the eyepiece generally has a longer focal length.

Advertentie

For example, it is possible, with one thick lens in air, to achromatize the position of a focal plane of the magnitude of the focal length.

The effective aperture is expressed by an f-number or f-stop (derived from focal ratio ), which is proportional to the ratio of the focal length to the diameter of the aperture.

The focal ratio (f-number, the ratio of the focal length to the dish diameter) of typical parabolic antennas is 0.25 - 0.8, compared to 3 - 8 for parabolic mirrors used in optical systems such as telescopes.

The light is not focused to a point but forms an Airy disk having a central spot in the focal plane with radius to first null of : where λ is the wavelength of the light and N is the f-number (focal length divided by diameter) of the imaging optics.

The plate scale is the reciprocal of the focal length of the camera lens; lenses are categorized as long-focus lenses or wide-angle lenses according to their focal lengths.

The length of the star trails is also governed by the lens focal length: with a wide angle such as I was using the stars would move a shorter distance across the frame than they would if I were more zoomed in.

Taken with just 250mm focal length for a field similar to binoculars.

The 102mm objective lens and paired with the 660mm focal length is the perfect planet viewing setup.

The lens has a 24mm focal length and an adjustable aperture from f/2.8 to f/11.

Besides the variations in different camera effects, this comparison demonstrates how focal length affects the shape of the objects in focus.

A newer 90mm Rodenstock lens for more distant subjects is $13,000 (and another telephoto lens with a longer focal length is on the way, too).

But the telephoto lens has a longer focal length of a 65mm that can optically zoom in up to 2.5 times.

Advertentie