If you're using an APS-C or Micro Four Thirds camera, you will have to work out the 35mm-equivalent focal length of your desired lens to find the category that it occupies.

Focal length of a convex lens: The distance between the optical centre and principal focus of a lens is called focal length. Focal length of a lens depends on the refractive index of the glass and ...

To clarify all your doubts about the concave lens and convex lens, students can read this article. Here, the difference between a concave lens and a convex lens has been discussed in detail.

Discover how these focal lengths can transform your portrait photography – and how each one shapes the way your subject is ...

Question A convex lens has a focal length of 5.0 cm. Calculate the power of the lens.

KnowHOW team explains: A magnifying glass is a convex lens ? both its surfaces are curved outward. When light ray passes through such a lens, having arrived along a direction parallel to its axis, ...