Depth of Focus

Depth of Focus measures the displacement of film within a camera. Also known as “lens-to-film tolerance”, depth of focus is measured microscopically (in thousandths of an inch, for example). Although this term has been interchangeable with “depth of field” in the past, depth of focus refers to the image placement on film within the lens, rather than the distance of the object from the lens.
Depth of Focus
Like depth of field, depth of focus decreases with larger lens apertures, meaning that the image will appear larger on the resulting printed photograph.
Unlike depth of field, however, depth of focus decreases with a shorter focal length or with a subject that is further away (depth of field increases under these circumstances).
With a standard lens, the formula for depth of focus is:
(Focal length x F-stop setting) / 1000
التسميات:

0 التعليقات :

Post a Comment

Subscribe to: Post Comments ( Atom )
 

Popular Posts

  • Gothic Photography
    Gothic photography is an elusive term that is almost as hard to define as Goth culture itself. Although some Goth photography is dark,...
  • American Standards Association (ASA)
    ASA, an acronym for American Standards Association, refers to an antiquated scale for film speeds devised by Kodak during the 1940s.  ...
  • F-Number
    F-Number, also known as a focal ratio, is the ratio of the diameter of the lens aperture to the length of the lens. On a camera, a pho...
  • The Remarkable Advantages Of Art Deco Architecture
    By Diane Reynolds Art deco in architecture features some bold colors and high contrast. There is strong geometry that involves the use of ...
  • What To Know About Photo Restoration Michigan
    By Jeffrey Fox In the olden days, the pictures used to be taken by use of old film cameras. People did not have a chance of saving them on...
  • How To Ensure You Have The Best Event Photo Booth Houston TX
    By Douglas Olson The purpose of Photo Booth is to make sure you have good entertainment for your event. If you are organizing a wedding or...
  • Dots per Inch (DPI)
    Dots per Inch (DPI), a measurement of resolution, refers to the number of dots a printed photo contains per square inch of space. The ...
  • Camera Phones: Pictures from Anywhere
    Camera cell phones provide fun ways of taking and sending pictures in a flash. In fact, these entertaining little gadgets are redefini...
  • Contrast Grade
    Contrast Grade refers to a series of numbers and categories that characterize photographic paper. Using a one to five scale and a spec...
  • Photojournalism
    Photojournalism is an area of photography dedicated to taking accurate shots of current events. The basic mission of a photojournalist...

ABOUT US

"World photography" is a photo community wich the initiative taken by Ismail El Moutaki with his two Friends Ayoub Filali and Driss El Amrani for a site, a facebook group and page on facebook, In the in order to help young beginner photographers to share their work and shoots with other photographers and exchanging their idea between them to improve their experiance in other side "worldcphotography " also gathers the professional photographers From differing countries of the world in order to give advices and share their experiences with the beginners in " world photography " , photographers can post their request to buy or sell cameras and accessories and photographs too