Expossure Picures

This is an example of an overexposed image:

This is an example of an underexposed image:
This is an example of a picture with good exposure:

Exposure

In photography, exposure is the total amount of light allowed to fall on the photographic medium (Photographic film or image sensor) during the process of taking a photograph. Exposure is measured in lux seconds, and can be computed from exposed value (EV) and scene luminance.

The "correct" exposure for a photograph is determined by the sensitivity of the medium used. For photographic film, sensitivity is referred to as film speed and is measured on a scale published by the International organization of standardization(ISO). Faster film requires less exposure and has a higher ISO rating. Exposure is a combination of the length of time and the level of illumination received by the photosensitive material. Exposure time is controlled in a camera by shutter speed and the illumination level by the lens apture. Slower shutter speeds (exposing the medium for a longer period of time) and greater lens apertures (admitting more light) produce greater exposures.

An important principle of exposure is reciprocity. If one exposes the film or sensor for a longer period, a reciprocally smaller aperture is required to reduce the amount of light hitting the film to obtain the same exposure. For example, the photographer may prefer to make his sunny-16 shot at an aperture of f/5.6 (to obtain a shallow depth of field). As f/5.6 is 3 stops 'faster' than f/16, with each stop meaning double the amount of light, a new shutter speed of (1/125)/(2·2·2) = 1/1000 is needed. Once the photographer has determined the exposure, aperture stops can be traded for halvings or doublings of speed, within limits.

Cite:http://en.wikipedia.org/wiki/Exposure_%28photography%29

THE TOMATO

This set of pictures are of a tomato just from different angles and views.

This picture, a leaf, showed the first day of Fall.

pro photographer

Albert Gilbert is a great photography expert that takes quality pictures. I like his pictures for the quality they have.

what i have learned so far

PIN HOLE CAMERAS DON'T/DO WORK

Camera similarities/differences

Our camera is very similar to the pinhole camera. it contains a shutter and it uses film. This camera is different from our pinhole camera because it had batteries and is way more complex.

The pictures below show the shutters on each camera:




The pictures below show where the film for each camera goes:

My Pinhole Camera

A Pinhole Camera

A pin hole camera is a camera with a fin hole as a shutter. Most pinhole cameras are made from a cereal box or something other unique. They only take black and white pictures and the film must be developed.

Our camera's foundation was a Club crackers box:
As you can see in the photo, we used a piece of thin card board for a shutter.

Directions to build:

First you need to gather all of these materials:

• Club crackers box
• Duct tape
• Thin Cardboard (for shutter)
• Scissors
• Pin

Directions

• Start with taping the box so that no light can get in at the corners
• then make a small slit at the top of the box (a worthy place to put the film in)
• put a piece of tape over the top of the slit but so you can easily take the tape off (to insert the film and take out the film with out letting light in)
• then take a pin and poke a whole in the face of the box opposite of the film
• Then cut a 1x1 in. shutter and tape it is such a way that the shutter can be opened (see picture below) easily. Then put another small piece of tape on the bottom of the shutter to hold it closed.
  

• NOTE: Pictures must be taken with the camera on its back and the shutter facing up (this will keep the film on the back wall of the camera).

Taking a Picture:

Taking a picture depends all on the light and time the shutter is open. An approximate time can be found on Google for how much light is present.

Components of a pin hole camera

Miles O (documenter), Jeromy T (builder), Arther B (builder)

Components of a pin hole camera

• Pin hole
  
• light tight box
• photo paper
• flap/shutter
• method to transfer paper into camera without exposing light

Design:

• Cereal box covered with duct tape
• The top can open to place photo paper in it but when closed is light tight
• A hole will be punctured in the center of the box
• A small thick piece of cardboard will act as a shutter
  

What i know:
Photograpghy is fun
it takes more skill than it looks
it can be a profession
it can be frustrating
.....


What i want to learn:
To photo shop pictures better
to take better pictures
to learn things i never knew about cameras
.....