What is the range of focal length of a zoom lens?
What is the range of focal length of a zoom lens?
- The greater the range of focal length a zoom lens offers, the more exaggerated these compromises must become. Zoom lenses are often described by the ratio of their longest to shortest focal lengths. For example, a zoom lens with focal lengths ranging from 100 mm to 400 mm may be described as a 4:1 or "4×" zoom.
What is a zoom lens and how does it work?
- A zoom lens is an optical apparatus that contains several lenses and glass elements. The focal point and angle of view can be adjusted within a given range. Zoom lenses offer the photographer high versatility without needing to change the lens.
How does the focal length affect the field of view?
- To expound upon what we've discussed in section one above, a lens with a shorter focal length (i.e., a lower mm number) gives you a wider field of view. A lens with a longer focal length (i.e., a higher mm number) gives you a narrower field of view.
Share this Post:
