Aperture priority question

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

 

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.

 

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.

 

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!

 

ok think i get it, if in aperture mode the shutter is selected automatically but can technically be manually overridden by adjusting the exposure?

 

Huh? Exposure is the combination of aperture, shutter speed and ISO. Are you speaking of adjusting the Exposure Compensation?

 

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!

 

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?

 

You set (actually FIX) aperture when in aperture priority.

Using the compensating dial changes ONLY the shutter speed.

 

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???