Exposure - 1/3 stop?

Discussion in 'Photography Beginners' Forum' started by prodigy2k7, Jun 25, 2008.

  1. prodigy2k7

    prodigy2k7 No longer a newbie, moving up!

    Joined:
    Apr 22, 2008
    Messages:
    1,665
    Likes Received:
    22
    Location:
    California, USA
    Can others edit my Photos:
    Photos OK to edit
    So, i been searching around, i cant find something that talks about "stops" in photography. Such as what does 1/3 mean, what is a full stop 1/1 ?
    How are stops used when using aperature and shutter?
     
  2. ANDS!

    ANDS! No longer a newbie, moving up!

    Joined:
    Nov 14, 2006
    Messages:
    2,178
    Likes Received:
    3
    Location:
    Downtown
    Can others edit my Photos:
    Photos OK to edit
    Stops are the different "steps" between Aperture values. The 1/3 refers to the "factor" of the stop. So going from f/1.8 to f/3.6 would be one stop.
     
  3. Mav

    Mav TPF Noob!

    Joined:
    Jan 1, 2008
    Messages:
    1,457
    Likes Received:
    2
    Can others edit my Photos:
    Photos OK to edit
    A full stop is a doubling of the shutter speed, or a halving. For aperture, a full stop smaller aperture lets half the amount of light through the lens as a full stop larger aperture. For precision cameras let you adjust down to 1/3rd stop.
     
  4. Mav

    Mav TPF Noob!

    Joined:
    Jan 1, 2008
    Messages:
    1,457
    Likes Received:
    2
    Can others edit my Photos:
    Photos OK to edit
    f/1.8 to f/3.6 is two stops, actually. The common full stops are:

    f/1.4, f/2, f/2.8, f/4, f/5.6, f/8, f/11, f/16, f/22, etc...


    more here: http://en.wikipedia.org/wiki/F-stop
     
  5. someguy5

    someguy5 TPF Noob!

    Joined:
    Apr 21, 2008
    Messages:
    63
    Likes Received:
    0
    Location:
    NYC
    can someone explain why a bigger aperature increases the cost of the lens?
     
  6. Big Mike

    Big Mike I am Big, I am Mike Staff Member Supporting Member

    Joined:
    Dec 16, 2003
    Messages:
    33,821
    Likes Received:
    1,811
    Location:
    Edmonton
    Can others edit my Photos:
    Photos NOT OK to edit
    A bigger aperture is (essentially) a bigger opening in the lens...which means a bigger barrel and larger pieces of glass for the lens elements. Also, lenses with larger apertures are usually top/pro level lenses which will usually use top quality glass and top build quality...all of which costs more money.
     

Share This Page

Search tags for this page

how many full stops between 1.8 and 3.6