White Balance and color temperature

White balance is the process of removing unrealistic color casts, so that objects which appear white in person are rendered white in your photo. Proper camera white balance has to take into account the "color temperature" of a light source, which refers to the relative warmth or coolness of white light.
http://www.cambridgeincolour.com/tutorials/white-balance.htm


incorrect white balance


correct white balance

Color temperature describes the spectrum of light which is radiated from a "blackbody" with that surface temperature. A blackbody is an object which absorbs all incident light-- neither reflecting it nor allowing it to pass through. A rough analogue of blackbody radiation in our day to day experience might be in heating a metal or stone: these are said to become "red hot" when they attain one temperature, and then "white hot" for even higher temperatures. Similarly, blackbodies at different temperatures also have varying color temperatures of "white light." Despite its name, light which may appear white does not necessarily contain an even distribution of colors across the visible spectrum:

http://www.cambridgeincolour.com/tutorials/white-balance.htm

Environmental portrait and others

An environmental portrait is a picture with a person in their normal environment, like at their home or workplace, and typically illuminates the subject's life and surroundings.


http://www.myphototricks.com/uploaded_images/eric-733309.jpg


OTHER PORTRAITS!!!!

Some other types of portraits are candid, posed, formal, couple, sporting, children, and groups.

CANDID
The subject is aware of you and your camera or a travel shot but may also include street or cafe photography.



POSED
Posed means that the photograph has communicated with the subject by word or body language that they desire a change of body position or expression. Its also means that whatever the photographer gets the subject to do in front of the camera.



FORMAL
A formal portrait is planned out. It might be a birthday, school portrait,dance photos or wedding pictures.




COUPLE
Its a portrait with more than one person as the main focus.



GROUP
A picture with anywhere from 3 to several hundred people. These pictures tend to be sports, wedding, family, business portraits.



SPORTING
Its shows the subject with their uniform, equipment in their sporting environment. The important part is to let the equipment and location tell part of the story.


http://www.npg.org.uk/live/images/sportcon.jpg

CHILDREN
The portraits normally fit into the categories of posed or candid aware.




All information provided by http://www.wildheart.com.au/public_panel/learn_photography_
now_page_files/portrait_photography/page8_types_of_portraits.php

Photoshop!!!

my sister with half of her that didn't
end up in the picture


With a little help from photoshop
my sister is complete!!!

Homecoming Week!!!

During homecoming week each class gets to "host" their own assembly.
The freshman and sophomore assembly was a great win for the junior class. We dominated their assembly and beat all the other classes in the game we had to play.


Sam directing Carly around the maze

Sierra waiting for them to try and step over her

Sam and Carly planning how to step over Sierra

And they made it!

after this part of the game our class easily made their way through the rest of the maze and ended up winning!

Depth of Field (information)

The depth field of a specific lens is the range of acceptable focus in front of and behind the primary focus setting. It is a function not only of the specific lens used but also of the distance from the lens to the primary focal plane, and of the chosen aperture. Larger apertures will narrow the depth of field; smaller apertures will increase it.


You can't understand Depth of Field until you understand COF (Circle of Confusion). The human eye has a finite ability to see fine detail. This is generally accepted as being 1' (minute) of arc. Translating this to the practical world, this means that at a normal reading distance the smallest object that a person with perfect eyesight, under ideal conditions can see is 1/16mm in size. If you place two dots smaller than this next to each other they will appear to be just one dot.

Suppose the lens focuses on the yellow dot as shown in the figure below. This subject generates a yellow dot on the image plane. Once focused, all subjects that have the same subject-lens distance as that of the yellow dot will appear sharp. Now, consider a white dot that is behind the yellow dot (i.e., with larger subject-lens distance). Since it is out of focus, it will not produce a sharp white dot image. Instead, its image is formed somewhere in front of the image plane. On the image plane, the image of this white dot is a circle as shown below. This circle is usually referred to as a circle of confusion. As the subject-lens distance increases, the size of this circle increases. The same holds true for a subject in front of the yellow dot (e.g., the green dot in the following figure). Since these circles of confusion are actually out of focus images of subjects, if we can reduce the size of circle of confusion, we can increase the sharpness of the resulting image. But, how?

It turns out to be very simple. Since circles of confusion are formed by light rays passing through the lens tube, the size of a circle of confusion is proportional to the amount of light that can pass through the lens tube. This means smaller (resp., larger) circles of confusion will be formed if less (resp., more) light can pass through. Restricting how much light can pass through the lens is the function of the diaphragm in the lens tube that sets the aperture values. Therefore, a smaller aperture means a smaller diaphragm opening, which, in turn, means allowing less light to strike the film/CCD plane. Thus, we have smaller circles of confusion and, as a result, a sharper image!

My exposure pictures

This white blob is a picture of an over exposed tv and computers.



This is of the same scene but it was under exposed thats why its dark.



The final product as close to normal as it is going to get!

Exposure

In photography, exposure is the total amount of light allowed to fall on the photographic medium during the process of taking a photograph .
Exposure is measured in lux seconds , and can be computed from exposure 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 aperture.

A photograph with an exposure time of 25 seconds

A photograph of a night-time sky with an exposure time of 8 seconds

A two second exposure of a fire poi ball dance

The shutter and aperture control how dark or light your pictures will come out and how focused they are.

To mess with the shutter and aperture your camera needs to have a manual setting


Sample shutter settings:
15" to 1/1600

Sample aperture settings
F2.7 to F8.0

What is a "Stop"?
A stop is making your aperture or shutter brighter.
examples: moving from f5.6 to f8 is:
ONE STOP darker and
moving from f4 to f2.8 is:
ONE STOP brighter




http://en.wikipedia.org/wiki/Exposure_(photography)