v stands for "Aperture Priority Mode"
Ever want to take a picture of someone and have the background "blurred" (like above)? Or maybe a landscape shot where everything is rendered in sharp detail from colorful flowers in the foreground to snowcapped mountains in the back?
In either case, the Av setting on your camera (or often just A) will be your new best friend.
Av is a "priority" setting that allows you to fix an appropriate shutter speed and ISO for correct exposure when you take a shot. Choose Aperture Priority Mode (Av) when you want to control the depth of field of your next shot.
What to use Av mode for
The Av setting is most useful in situations when you know that you have a shallow or deep depth of field. If you 're shooting a portrait, you' ll often have a shallow depth of field (open f / 4 or something similar (small f number).
For landscapes, you'll often want a deep depth of field, so stop down to f / 22 or something simliar (big f number).
Apertures are noticeable by an f in front of a number (ie f / 8), although sometimes they will appear on your camera as if you do not know their typical range ( see below) or where in the readout they appear.
Final tip
If you are having trouble remembering how the aperture numbers relate to the depth of field. Big number = deep depth of field. Think about it and you'll sink into it!Here's a list of full stop aperture numbers (you'll hear them called f / stops) that will result in shallow to deep depth of field (note: cameras and intermediate stops in between these numbers). It is also the case that there are smaller and smaller apertures (i.e., f / 64) than listed below but this range covers the majority of SLR / DSLR lenses.
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Good luck!!
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