Screen printing is a printing technique that uses a mesh to transfer ink onto a substrate. A squeegee is used to push ink through the mesh onto the substrate. This allows the ink to wet the substrate in the open areas of the mesh while keeping it blocked in the impermeable areas.
Photography is the process of capturing images using light or related radiation and recording them on a light-sensitive material like film or digitally. The key elements that control a camera's exposure are aperture, shutter speed, and ISO speed, which work together to determine how much light reaches the sensor or film. Changing any one element impacts the exposure.
2. Screen printing is a printing technique whereby a mesh is used to
transfer ink onto a substrate, except in areas made impermeable to the
ink by a blocking stencil. A blade or squeegee is moved across the
screen to fill the open mesh apertures with ink, and a reverse stroke
then causes the screen to touch the substrate momentarily along a line
of contact. This causes the ink to wet the substrate and be pulled out of
the mesh apertures as the screen springs back after the blade has
passed.
Basically, it is the process of using a mesh-based stencil to apply
ink onto a substrate, whether it be T-shirts, posters, stickers, vinyl, wood,
or other material.
SILK-SCREEN PRINTING
8. WHAT IS PHOTOGRAPHY?
• Historically the word Photography is derived from the greek words "photos"
(meaning "light") and "graphein" ("to draw"). It was used by scientists to
describe a method of recording images by the action of light, or related
radiation, on a sensitive material.
•'the art and science of capturing the image of
a certain event in time and recording it in a
film or a digital medium using a camera.'
11. CLASSIFICATION OF CAMERA
• Compact Cameras or Point-and-Shoot cameras are those cameras that
allow you to do just that -- "Point" and "Shoot".
• Traditional compact cameras use a simple window through the body of the
camera as a viewfinder.
12. • Cameras that belong to this classification may range from more advanced
compact cameras to SLR-like super zooms and Bridge Cameras. The
differences between these and Compact cameras are: Sub-Compact
cameras can be used with Automatic, Semi-manual, or Fully Manual settings;
they may have a bit larger bodies and usually larger sensors and larger
lenses; they generally have longer zoom ranges; and obviously a bit heavier.
CLASSIFICATION OF CAMERA
13. • Single Lens Reflex cameras use only one main lens set. The image from this
lens is delivered to the viewfinder through a set of mirrors and / or prisms
working like a periscope. When the shutter button is pressed, the mirror
momentarily closes to allow the image to go from the lens directly to the
imaging chip. This way, the viewfinder will show the user to the actual image
as it
CLASSIFICATION OF CAMERA
14. • Rangefinder Cameras are another category of cameras that are fitted with
a rangefinders to determine the distance of an object. Traditional
rangefinders display two images of the same object in the viewfinder, one
each from two different opening in the Camera. The distance of the focused
object is determined by adjusting a focusing ring and making these two
images align. This distance is then transmitted to the lens to obtain a proper
focus on the subject.
CLASSIFICATION OF CAMERA
15.
16. APERTUDE
• A camera’s aperture setting controls the area over which light can pass
through your camera lens. It is specified in terms an f-stop value, which can
at times be counter intuitive because the area of the opening increases as
the f-stop decreases. In photographer slang, when someone says they are
“stopping down” or “opening up” their lens, they are referring to increasing
and decreasing the f-stop value, respectively.
17. SHUTTER
• A camera’s shutter determines when the camera sensor will be open or
closed to incoming light from the camera lens. The shutter speed specifically
refers to how long this light is permitted to enter the camera. “Shutter speed”
and “exposure time” refer to the same concept, where a faster shutter
speed means a shorter exposure time.Shutter speed’s influence on exposure
is perhaps the simplest of the three camera settings: it correlates exactly 1:1
with the amount of light entering the camera. For example, when the
exposure time doubles the amount of light entering the camera doubles. It’s
also the setting that has the widest range of possibilities.
18. ISO SPEED
• The ISO speed determines how sensitive the camera is to incoming light.
Similar to shutter speed, it also correlates 1:1 with how much the exposure
increases or decreases. However, unlike aperture and shutter speed, a lower
ISO speed is almost always desirable, since higher ISO speeds dramatically
increase image noise. As a result, ISO speed is usually only increased from its
minimum value if the desired aperture and shutter speed aren’t otherwise
obtainable.
19. EXPOSURE
• When these three elements are combined, they represent a given exposure
value (EV) for a given setting. Any change in any one of the three elements
will have a measurable and specific impact on how the remaining two
elements react to expose the film frame or image sensor and how the image
ultimately looks.