Digital Photography: May 2014

Digital Photography

Pin Hole Camera

Introduction:

Pinhole camera is a simple camera with small hole without any lenses with single small aperture. Light from a scene passes through this single point and projects an inverted image on the opposite side of the box.

It is completely dark on all the other sides of the box including the side where the point is created. This part is usually painted black, but black boxes are also used for this purpose. There is also a thin screen which looks like a projector sheet, and is put in between the dark side adjacent to the pinhole.

Up to a certain point, the smaller the hole, the sharper the image, but the dimmer the projected image. Optimally, the size of the aperture should be 1/100 or less of the distance between it and the projected image.

History:

pinhole lens less camera is a light-tight box with a very fine round hole in one end and film or photographic paper in the other. Light passes through the hole; an image is formed in the camera.

The image-forming ability of a tiny hole is thought to have been known thousands of years ago by nomadic tribes of North Africa, who lived in animal skin tents. A pinhole in the tent would project an image of the brilliant scene outside.

Process:

1. To do a pinhole camera, there is a process to make it work. we need such material to carryout the pinhole camera. First the material that we need is:

(a) Biscuit tin

(b) Thumb tack

(d) Chemical

(e) Cleaning tools for pinhole camera

2. The procedure that we use during carryout those activities:

-Identify the best place with good brightness then you may hoot.-Ready to shoot and set up your time around (2-7 seconds)

-Open the hole at camera and close.

-Then, go to the darkroom for take out the paper from camera. (do not hit the light)

-Through the paper into the chemical.

-There is 3 chemicals that have been used in this process
a) Paper developer (1;19) (2 min)
b) Stop bath (1;19) (1 min)
c) Paper fixer (5 min)

-At last, put paper in the tap water

The example of pinhole camera image

3. The problem that we have been through during this process:

a. First is the picture that we captured by this type of camera is the problem with the light.

b. Then the picture that we captured sometimes does't look like the things that we try to capture (unclear)

BLACK AND WHITE FILM

Introduction:

Black and white film is an image that have combine black and white together in a continuum providing a range of shades of gray.

Use in photography

Photography was black-and-white or shades of sepia. Color photography was originally rare and expensive and again often less than true to life. Color photography became more common in the middle of the 20th century and has become even more common since. Nowadays black-and-white has turned into a niche market for photographers who use the medium for artistic purposes. This can take the form of black-and-white film or digital conversion to gray scale, with optional digital color editing manipulation to enhance the results. For amateur use certain companies such as Kodak manufactured black-and-white disposable cameras until 2009. Also, certain films are produced today which give black-and-white images using the ubiquitous C41 color process.

Process during carryout this activity

Materials that been use in this activity