Aperture coefficient and field of view angle

Source: Internet
Author: User

Aperture factor: The aperture factor is the value of the lens focal length divided by the diameter of the optical hole, expressed in F

For example, there is a third lens: a lens with a focal length of 50mm, the maximum aperture diameter of 25mm, then the aperture coefficient is 50/25=2, we say it is F2 lens;

The lens has a focal length of 35mm and a maximum aperture diameter of 17. 5mm, the aperture factor is 35/17. 5=2, we also say it is the lens of F2;

The lens has a focal length of 100mm and a maximum aperture diameter of 25mm, then the aperture factor is 100/25 = 4, which we say is the F4 lens.

Field of view: The angle of view of the lens refers to the angle of the camera's imaging surface edge and the rear of the lens.










Contact Us

The content source of this page is from Internet, which doesn't represent Alibaba Cloud's opinion; products and services mentioned on that page don't have any relationship with Alibaba Cloud. If the content of the page makes you feel confusing, please write us an email, we will handle the problem within 5 days after receiving your email.

If you find any instances of plagiarism from the community, please send an email to: info-contact@alibabacloud.com and provide relevant evidence. A staff member will contact you within 5 working days.

A Free Trial That Lets You Build Big!

Start building with 50+ products and up to 12 months usage for Elastic Compute Service

  • Sales Support

    1 on 1 presale consultation

  • After-Sales Support

    24/7 Technical Support 6 Free Tickets per Quarter Faster Response

  • Alibaba Cloud offers highly flexible support services tailored to meet your exact needs.