Cameras

June 10, 2009 RENU

  1. Camera records images either as still photo or as moving videos or movies.
  2. Camera Obscura in Latin means dark chamber & modern camera evolved from it. To make one at home- Cellotape a magnifying lens on 1side of the shoe box, leave the other side of box open. Point lens towards a distant overhead lamp. Move a tracing paper or any paper coated with oil  towards & away from front of the shoe box & affix the paper onto cardboard frame when image is clear. Or If you know the focal length of the lens already, simply fix paper at a distance of the lens focal length, measured from the lens.
  3. 5-4th centuries B.C.- Chinese & Greek philosophers describe the basic principles of optics & camera.
  4. 1664-1666 Isaac Newton discovers that white light is composed of diff colors.
  5. 1827- 1st photo taken by Joseph Niepce but took hours to get a permanent exposure.
  6. George Eastman invented 1st film which is flexible & paper-based on roll in 1884 & the small box camera called Kodak in 1888 designed specifically for roll film. This was the first time that cameras became relatively easy to carry around and take photos. It was still nothing like the cameras today, but photography as a hobby had been born. He was a high school dropout & was self-educated.  
  7. In the early 1900’s the 35mm camera was invented by Oskar Barnack. The 35mm enabled high quality photos to be taken on rolled film. It is the most commonly used still camera & uses 35mm film.
  8. Edwin Land invented Polaroid camera in 1947.
  9. In the 1990’s digital cameras were introduced to the mass market by Kodak. These cameras became very popular by the year 2000. Digital photos are easy to use, share, email, store, check immediately, affordable since no film needed, easy to delete if you don’t like.
  10. Amateurs use digital cameras more often while professionals use DSLR i.e digital SLRs(Single Lens Reflex).
  11. Cameras work with the light of the visible spectrum i.e portion of the electro magnetic spectrum(EMS) that is visible to the human eye or with other portions of the EMS.  EMS is the range of all the possible freq’s of EM radiation.
  12. Focussing mechanism- SLR & DSLR cameras have this with meters. Most cameras these days have auto focus mechanisms that have made focusing much easier. 
  13. Camera types- Compact, semi-professional model, SLR or beyond. 
  14. Compact are small & easy to use. If you are an amateaur, go for an automatic compact models so don’t have to be bothered with focus, exposure etc. Compacts latest features are Image Stabilization that ensures blur-free pictures even in low light conditions & Face Detect that ensures that the camera focuses on the subject’s face even if it is located off the center of your frame, giving you in-focus subjects at all times.  
  15. Semi pro cameras- Offer SLR-like features at a low price & weight to SLRs. They give a lens with a wide zoom range or give an external flash, allow manual override on focus, shutter speed, aperture etc.
  16. SLR or D-SLR are professional cameras.
  17. Camera parts- 
  • Aperture- opening at 1end for light to enter.
  • Body- Limits the amount of light that exposes the sensitive film.
  • Film- Available in color or black & white. Color films include slow films (25-64 ISO), medium films (100-200 ISO), fast films (400-1000 ISO) and ultrafast films (1600-3200 ISO).
  • Lens- in front of camera’s aperture to gather the incoming light & focus all or part of the image on the recording surface i.e film. Design & manufacture of the lens is critical to the qlty of the photo. It is the most imp part since it has to reduce any kind of aberrations & the focal length(FL) helps in determining the magnification of as subject. Wide angle lens- FL is betn 21-35mm, used for landscapes. Normal lens- FL 35-70mm, for std/hobby. Medium telephoto- FL 70-135mm, for portraiture. Tele Zoom- FL 135-300+mm, for wildlife, nature, sports.
  • Shutter/shutter release button- is used to take a picture. When pressed, shutter is released, so that it opens to capture a picture & then closes, allowing an exposure time as determined by the shutter speed setting which may be automatic. It is 1 of the basic features of a handheld camera. The different types of shutters used in modern day cameras include leaf shutters, diaphragm shutters, focal plane shutter, projector shutter and central shutters.
  • Viewfinder- Enables you to see the subject. 2types. The 1st type will allow you to look through the lens of the camera while the other will enable you to view at a plane parallel to the camera lens. 
Advertisements

Entry Filed under: Photography

Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out / Change )

Twitter picture

You are commenting using your Twitter account. Log Out / Change )

Facebook photo

You are commenting using your Facebook account. Log Out / Change )

Google+ photo

You are commenting using your Google+ account. Log Out / Change )

Connecting to %s

Trackback this post  |  Subscribe to comments via RSS Feed

Pages

Categories

Calendar

June 2009
M T W T F S S
« May   Jul »
1234567
891011121314
15161718192021
22232425262728
2930  

Most Recent Posts

 
%d bloggers like this: