lens ratio question

13 years 8 months ago #185 by shadowstorn
Are the lens ratio that is found on the Nikon cameras common or similar to most brands?


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13 years 3 weeks ago #47434 by jjharr1
shadowstorn,
What do you mean by lens ratio?
If you are referring to the lens aperture, keep in mind that the f-number is a ratio between the diaphragm opening and the focal length of the lens.

The specifications for a given lens typically include the maximum and minimum apertures, for example, f/1.4–f/22. In this case f/1.4 is the maximum aperture (the largest opening), and f/22 is the minimum aperture (the smallest opening). The maximum aperture tends to be of most interest, and is always included when describing a lens. This value is also known as the lens "speed", because it affects the exposure time.

In lens pricing, a faster lens is usually more money.


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