Rather, you’re going to need to memorize each of the above f-values (aka “f-stops”) as categories. In other words, do not start mentally comparing these whole numbers to decimals, or trying to make a relationship between these numbers using math. The key to understanding this all right away is to immediately disregard these numbers as any sort of actual numerical value in relation to one another. The “whole” stops of f/5.6 and f/8 have two in between points that you can dial your camera for. For example, between 5.6 and 8 there is f/6.3 and f/7.1, too. Between each of these values, most modern cameras will allow you to set values 1/3 of the way between. The above chart lists all “common” aperture values, as denoted by the corresponding f-values. Since this is a profile graphic, it’s a little difficult to understand what the opening actually looks like, so the below graphic shows the head-on view of a lens aperture.Īs you can see, for each diameter of aperture there is a corresponding “f” value. The two small black lines represent the outer openings of the aperture. A camera’s aperture is basically the diameter of the opening within the lens that allows light to pass through to then reach the sensor (or film, in the good ol’ days).Ībove is a graphic of a side profile of a typical SLR camera, with lens pointing towards the right. To start with, let’s define what a camera aperture is, and what the f-stop designation actually means. If you’re an enthusiastic amateur at photography and haven’t yet gotten past the “auto” mode on your camera, this is the best place to begin with in expanding your photographic prowess and understanding – by choosing your own aperture to shoot with.
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