Notes by Fayzan Gowani

Notes – February 15^th, 2008

Friday, February 15^th, 2008

1. Cameras vs. computers

1. Dynamic range:

1. camera’s have limited range of capturing shadow and light details.
2. Computer software can fix light level differences

2. Depth of field

1. Definition: The range of depths that are [sufficiently] in focus and not in focus

1. [Sufficiently] because, as photographers, when the object gets pretty focused, the object is in focus. As
2. It is hard to get depth of field in bright light
3. Circle of Confusion: when you have light converging onto your image, a dot or a speck that is not in focus becomes bigger and is seen in the photograph
4. the bigger the aperture, the lesser the depth of field
5. for an amateur, more depth of field is good

3. F-stops

1. Ratio of: focal-length/aperture

2. Normal lens: a size of lens
1. Some believe it to be vaguely “what you would normally see our of your own eyes”
2. Technical definition: a lens whose focal length is equal to the diagonal length of the lens
3. Different “normal lenses” for film cameras and digital cameras
3. The bigger the lens, the fewer the f-stops

4. Digital cameras

1. Aspect ratio: ratio of length and width of picture

2. Image sensors: small image sensors retrieve cropped images, a smaller part of a photo
1. A subsection of the photo, zoomed in by the image lens
3. Lenses on digital cameras are more telephoto than on a film camera because of the image sensors

5. Assignment:

1. Take several images of the same subject with different focal lengths