This is part of a four-part series on exposure.
Last week we talked about basics of exposure – essentially what does what. I’d like to begin going into these in some more detail, starting today with Shutter Speed.
Shutter speed, aperture and ISO are inextricably linked together. To achieve your perfect image, all of them are equally important and they have to balance each other out. Sometimes this link is more or less obvious than at other times, but it’s always there.
There are countless combinations of these three elements that will grant you a technically accurate exposure… that is, provide enough light to show all the detail in the picture, without it being under or over-exposed. This is generally pretty easy to achieve; set your camera to auto and press the shutter button.
But the real fun begins when you start to look at possible photo opportunities with some understanding of the way each of these elements will affect your image. Then, instead of simply trying to get the right amount of light to create an “okay” looking photo, you can choose your settings creatively to gain the best result from the subject in front of you.
Before taking each photo you can think, “Do I want this whole scene in focus? Or do I want to isolate just one area and blur the rest?”, “Do I want to freeze the motion in my photo? Or would I prefer a stretch of sweeping motion-blur to create a different, more dynamic effect?”, and even, “Do I want this image to have a completely smooth finish, or would this subject be complimented by a more gritty, noisy texture?”
As you make a practice of thinking like this, and of experimenting whenever possible, more and more possibilities become obvious with every photo opportunity.