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This is important to know because there will be times that you want to use a particular shutter speed but your lens won't be able to accommodate your request.įor example, you might encounter this problem when shooting in low-light situations: if you are shooting a fast-moving subject that will blur at a shutter speed slower than 1/125 of a second but your lens's largest aperture is f/3.5, you might see that your aperture display in your viewfinder and the rear LCD panel will begin to blink. In this instance, you are controlling the shutter speed and the camera is controlling the aperture. This means that you are taking control over one aspect of the total exposure while the camera handles the other.
#Canon eos rebel t3i shutter speed tv#
The other thing to think about is that Tv mode is considered a "semiautomatic" mode. With that much latitude, you should have enough control to capture almost any subject. The T3i has a shutter speed range from 1/4000 of a second all the way down to 30 seconds. This is why it's important to know what these speeds represent in terms of their abilities to stop the action and deliver a blur-free shot.įirst, let's examine just how much control you have over the shutter speeds. It's not like you can go ask the quarterback to throw that touchdown pass again because your last shot was blurry from a slow shutter speed. But what if your subject won't give you a do-over? Such is often the case when shooting sporting events. The great thing about shooting with digital cameras is that you get instant feedback by checking your shot on the LCD screen. It is important that you are able to visualize the result of using a particular shutter speed. Because a slower shutter speed means that light from your subject is hitting the sensor for a longer period of time, any movement by you or your subject will show up in your photos as blur.įigure 4.6 Increasing the length of the exposure time gives flowing water a silky look.Īs you can see, the subject of your photo usually determines whether or not you will use Tv mode. One of the major influences on the sharpness of an image is camera shake as well as the subject's movement. This is different from the image being sharply in focus. The shutter speed also, to a large degree, determines how sharp your photographs are. The longer it remains open, the more time your sensor has to gather light. The selected shutter speed determines just how long you expose your camera's sensor to light. In this case, we are talking about shutter speed. Just as with Program mode, Tv mode gives us more freedom to control certain aspects of our photography. In all my years of shooting, I don't ever recall thinking, "Hey, this would be a great situation to use the Time Value mode." However, you don't need to know why it is called Tv mode the important thing is to know why and when to use it. If you dig deep in your manual, you will actually see that Tv stands for "Time Value." I'm not sure who came up with this term, but I can tell you that it wasn't a photographer. Tv mode is what we photographers commonly refer to as Shutter Priority mode. Learn More Buy Tv: Shutter Priority Mode Canon EOS Rebel T3i / 600D: From Snapshots to Great Shots