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Depth-of-field

The distance in front of and behind the subject that is acceptably in focus

When a subject is brought into sharp and accurate focus, the lens generates a zone extending in front of and behind the subject plane within which all objects will register sharply and clearly on the film. This zone is called the “depth-of-field”.

Sometimes you will want everything in the foreground and background in focus. Sometimes you will want a subject in the foreground to be in focus while keeping a busy background out of focus. f-stops are the main factor that controls this effect, with blurring most apparent at large apertures. Small apertures keep more of the frame in focus than larger apertures. For example, f/16 will keep most if not all of the image in focus. f/2 will keep just the subject plane in focus, leaving the rest of the image blurred.

N.B. The larger the aperture, and the closer the focal distance, the shallower the depth-of-field. Stopping down to smaller apertures increases the depth-of-field (or focusing tolerance). Depth-of-field is greater beyond the point of focus than in front.

  • Rangefinder Cameras
  • Focal Plane
  • Focal Length & Aperture
  • f-stop
  • Numbers on a lens
  • Prime lens
  • Fast lens
  • Angle-of-view (AOV)
  • Elements & Groups
  • Coatings
  • Leaf shutters
  • Shutter speed
  • Film speed ASA/ISO
  • EV / Exposure Value
  • LV / Light Value
  • LV Tables
  • Priority
  • Depth-of-field
  • Bokeh
  • Apparent Subject Motion
  • Light meters
  • Be meter free
  • The Sunny 16 Rule
  • Double & half
  • Parallax
  • Rangefinder Vs. SLR
  • Filters
  • Filters: UV
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  • Filters: Polarizing
  • Filters: ND
  • Filters: Black & White
  • Diffraction
  • Multiple Exposures
  • Sharpest Aperture
  • C-41 B&W
  • Zone focusing
  • Half-frame
  • Vignetting
  • Guide Number
  • X & M
About Ilott Vintage

A valuable reference for anyone wanting to learn more about rangefinder cameras, manual film photography, or both, this website is intended to serve not only as a resource to discover some amazing objects but also as a place to learn more about them, to understand exactly what they are capable of, and why. Read More

See Also
  • Fujica V2 Super sharp shooter
  • Argus C3 vintage rangefinder
    Argus C3 The Brick
  • Minolta AL
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    Wednesday 22nd March 2023