Digital Photo Tips - General requirements for Aperture settings
One of the most confusing settings for beginners to get a grip on what is good photographers use aperture settings or f -stop. The biggest misconception is that controls opening the shutter speed or vice versa. If fact, the two work together to achieve optimal exposure for your image. This should be the main focus of all your photos . How you choose to focus on your subject is a subject for other items.
Essentially, the aperture and shutter work to provide the proper ratio of light speed. If you select a larger aperture , smaller f-stop like 2.8, you allow more light through the lens . This allows you to use higher shutter speeds to capture blur-free motion. Keep in mind that the higher the f -stop, the shallower your depth of field will be. An object in the background may appear blurred or with a large open f -stop, but appear in clear focus with a small stop or closed . So in general , this is where you want to be with your aperture setting of various types of pictures .
For portraits , you'll probably tend to start more at the open end of the creation , which means a small number f . This is useful if you are trying to eliminate background noise due to the shallow depth of field.
At the other end of the spectrum would be landscape and architectural images. Here, you will probably start with your opening closed as low as possible for the greatest depth of field. With this kind of photography , smaller openings are required due to the size of the object and the proximity to the camera . But you will need to use slower shutter speeds much if a tripod and shutter cable are useful to have for these shots.