Transcript Introducing a New Product - Pennsylvania State University

The Film Camera
Physics 001
Richard H. Lucas
RHL5058
Three Basic Parts

Optical Element (The Lens)

Chemical Element (The Film)

Physical Element (The Body)

We will discuss the Lens.
The Lens (Simple Description)

Curved Piece of
glass.

Takes beams of
light from an object
and redirects to
form a real image.

The lens slows light
down.
Lens Change in Speed of Light

Part of the wave
hits the lens first,
slowing it down.

Common example
is a shopping cart
hitting grass at an
angle.
Convex & Double Convex Lens
Convex
Double Convex

Light bends toward
center upon entry.

At the Point where the rays converge, a real
image is Formed.

Light bends on
entry and exit.
Camera Lens Zoom

To get the beams to
converge at the
same point, you
adjust the lens and
move it closer or
farther from the
object.
Light Path

Depends on Angle
of entry & lens
structure.
Angle of Entry

Changes when
object is farther or
closer.
Light Path (Continued)
Structure of Lens

A rounder lens
results in a more
acute bend angle.

The distance
between the lens
and real image
changes its size.

The bending angle
is the same
throughout the lens.
Magnification Power

Described by focal length.

The greater the focal length, the higher the
magnification.
Magnification Lenses
Telephoto Lens


Have a long focal
length to magnify
the image
significantly.
Used when object
is far away.
Wide Angle Lens

Have a short focal
length to shrink the
image.

Used when a large
object is very close.
Personal Gratification
I have always had an interest in photography
and cameras. I was once hired as a photographer
for a wedding, but I never knew exactly how the
camera worked. Particularly, I was not familiar with
the mechanics of the lens. My professor brought
up the topic about cameras in class and mentioned
what 35 mm actually meant. It was that moment
that I decided to do my project on camera lenses. I
use cameras constantly and it is certainly nice to
understand exactly what goes on inside of the
complicated machine.
Citations

Harris, Tom. "How Cameras Work" 21
March 2001. HowStuffWorks.com.
<http://electronics.howstuffworks.com/came
ra.htm> 16 April 2014.
"Basic Information about Binoculars Magnification."
Nikon. N.p., n.d. Web. 16 Apr. 2014.
<http://nikon.com/products/sportoptics/how_to/guide/bin
oculars/basic/basic_03.htm>.