Converging lens
see Convex lens.
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More Photographic Terms ...
-Converging lens - see Convex lens.
-Convertible lens - compound lens made in two sections, the elements of which are arranged so that when one part is unscrewed it provides a new lens with approximately twice the original focal length.
A real image formed by a converging lens would be visible upon a screen placed in this plane. INCANDESCENT -Glowing with heat, such as the tungsten filament in an incandescent lamp.
For a converging lens (for example a convex lens), the focal length is positive, and is the distance at which a beam of collimated light will be focused to a single spot.
So far, we've looked at the basic idea of photography -- you create a real image with a converging lens, and you record the light pattern of this real image on a layer of light-sensitive material.
By the end of the sixteenth century Italian academics had fitted a converging lens into the hole which produced a much brighter and sharper picture.
the back focus is designed longer than the lens' focal length to allow clearance for the movement of the reflex-mirror (No Mirror Lock up or seperate viewing accesory attachment is required). It consists of front diverging apd rear converging lens ...
 See also: Lens, Photography, Photograph, Focus, Light
  
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