Aperture priority question

Discussion in 'Photography Beginners' Forum' started by puyjapin, Nov 26, 2008.

  1. puyjapin

    puyjapin TPF Noob!

    Joined:
    Nov 5, 2008
    Messages:
    759
    Likes Received:
    0
    Location:
    Warwickshire UK
    Can others edit my Photos:
    Photos NOT OK to edit
    Hi, could someone please explain while im trying to get to grips with all this stuff !!:blushing:
    When in Aperture priority this allows the f stop to be changed to alter DOF hence i tend to use this for landscapes. But as the exposure can be altered by 1/3 stop incriments this obviously has an effect on the shutter speed. So effectively what is the difference in using A mode opposed to full Manual where both can be altered?:blushing:
    thanks
     
  2. drumsforlife15

    drumsforlife15 TPF Noob!

    Joined:
    Jan 9, 2008
    Messages:
    28
    Likes Received:
    0
    Location:
    GA
    Can others edit my Photos:
    Photos NOT OK to edit
    In Aperture-Priority mode, you just set the aperture and the camera sets the shutter speed accordingly. In full manual, you have to set it all. I use Aperture and Shutter-Priority when I want to specifically change either the DOF or how motion appears (SS). Its just another way to be creative and take control of your photography without going full manual.

    Hope this helps.
     
  3. 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
    In manual mode you are controlling everything. Anything not set by you is left to the camera based on default settings.

    In AP mode, the same generally applies EXCEPT for the Shutter Speed which is controlled by the camera. The problem with this is, for a beginner - and some "pros" - the camera can easily be fooled by what it is "seeing", so - especially with landscape photography - it might be better to work in full manual, so that you can adjust your settings without worrying about your subject going anywhere.
     
  4. Overread

    Overread has a hat around here somewhere Staff Member Supporting Member

    Joined:
    May 1, 2008
    Messages:
    23,099
    Likes Received:
    3,765
    Location:
    UK - England
    Can others edit my Photos:
    Photos OK to edit
    The difference is that in aperture priority mode the camera will automatically adjust your shutter speed to attain correct exposure whilst leaving your aperture and ISO fixed - its good when your wanting to shoot at a set aperture in changing lighting conditions.
    Of course you can use exposure compensation to tell the camera to under or overexpose a shot which will affect its selection of a shutter speed to attain the "correct" over/under exosure.

    In the end no matter what mode you are in the settings (if the same) will have the same effect.
     
  5. deanimator

    deanimator TPF Noob!

    Joined:
    Jun 1, 2007
    Messages:
    534
    Likes Received:
    0
    Location:
    East Germany
    Can others edit my Photos:
    Photos NOT OK to edit
    As the others have already said...set the aperture when DOF is your prority, and shutter speed is of lesser importance.

    In normal light you may see little difference, but in lower light any movement may become blurred. This is rarely a problem in landscape and still-life shots.

    Pay attention to what in the scene may cause the exposure to become less than optimal...use the compensation or switch to manual to manage this. Pay attention to the camera monitor result and especially when you have a chance to upload and examine your results on a computer. You´ll work this out better with time and practice...just learn from the theory and the practice!
     
  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
    :thumbup:
     
  7. puyjapin

    puyjapin TPF Noob!

    Joined:
    Nov 5, 2008
    Messages:
    759
    Likes Received:
    0
    Location:
    Warwickshire UK
    Can others edit my Photos:
    Photos NOT OK to edit
    ok think i get it, if in aperture mode the shutter is selected automatically but can technically be manually overridden by adjusting the exposure?
     
  8. kundalini

    kundalini Been spending a lot of time on here!

    Joined:
    Jul 18, 2007
    Messages:
    13,601
    Likes Received:
    1,929
    Location:
    State of Confusion
    Can others edit my Photos:
    Photos NOT OK to edit
    Huh? Exposure is the combination of aperture, shutter speed and ISO. Are you speaking of adjusting the Exposure Compensation?
     
  9. deanimator

    deanimator TPF Noob!

    Joined:
    Jun 1, 2007
    Messages:
    534
    Likes Received:
    0
    Location:
    East Germany
    Can others edit my Photos:
    Photos NOT OK to edit
    Yep.... use the dial that gives you the + or - effect.
    Use the + if the scene has a high brightness or whiteness value
    and the - if it´s effect is to be dark

    Just try a few tests...for example: photograph a dark-skinned person against a black background...try the whole range and note the exposures and correct them...eventually you will see how to do that while you shoot. Some scenes will change so fast you will have no time to think...it has to become intuitive!
     
  10. puyjapin

    puyjapin TPF Noob!

    Joined:
    Nov 5, 2008
    Messages:
    759
    Likes Received:
    0
    Location:
    Warwickshire UK
    Can others edit my Photos:
    Photos NOT OK to edit
    yes the exposure compensation, when i set an apeture and adjust the exp comp it has an effect on the shutter speed in aperture mode so in effect its affectiong the shutter as well?
     
  11. deanimator

    deanimator TPF Noob!

    Joined:
    Jun 1, 2007
    Messages:
    534
    Likes Received:
    0
    Location:
    East Germany
    Can others edit my Photos:
    Photos NOT OK to edit
    You set (actually FIX) aperture when in aperture priority.

    Using the compensating dial changes ONLY the shutter speed.
     
  12. puyjapin

    puyjapin TPF Noob!

    Joined:
    Nov 5, 2008
    Messages:
    759
    Likes Received:
    0
    Location:
    Warwickshire UK
    Can others edit my Photos:
    Photos NOT OK to edit
    but its possible to fix the apeture and shutter in manual so if shooting in aperture but overriding the exp comp , thus changing the shutter speed you are effectively using manual anyway?? the a mode chooses a shutterspeed in accordance with your selected aperture...to allow for the meter reading i assume so anthing other than average will require a manual exp compensation hence the shutter speed is not being selected automatically so may as well be in manual???
     

Share This Page