A camera lens (also known as photographic lens, objective lens or photographic objective) is an optical lens or assembly of lenses used in conjunction with a camera body and mechanism to make images of objects either on photographic film or on other media capable of storing an image chemically
a lens that focuses the image in a camera
make a schematic or technical drawing of that shows interactions among variables or how something is constructed
A simplified drawing showing the appearance, structure, or workings of something; a schematic representation
a drawing intended to explain how something works; a drawing showing the relation between the parts
A figure composed of lines that is used to illustrate a definition or statement or to aid in the proof of a proposition
(diagramming) schematization: providing a chart or outline of a system
Lenses on Kodaks 1942
Kodak Anastigmat Special f/3.5, 50mm (as used on Kodak 35)
Kodak Anastigmat f/4.5, 51mm, and f/5.6, 50mm (as used on Kodak 35)
Kodak Anastigmat Special f/4.5, 47mm (as used on Kodak Bantam)
Kodak Anastigmat Special f/4.5, 100mm, 101mm and 127 mm (as used on Kodak Monitors and Kodak Vigilants)
Kodak Anastigmat f/4.5, 103mm and 126mm (as used on Kodak Monitors and Kodak Vigilants)
Kodak Anastigmat f/6.3 105mm and 130mm (as used on Kodak Vigilants)
Focal Length
After not knowing what the focal length was, I drew this diagram to help me (and Dan) understand it.
A short focal length receives light from a wider angle, while a longer focal length is a narrower angle.
Now I assume that a short focal length with a small aperture, is the same as a long focal length with a large aperture, but the trade-off is amount of light captured and the area of the glass used.