![]() This principle is true for all the following F-stops. F/2 – again, blades stop two times further than at the previous step.F/1.4 – the “ring of blades” is two times wider as for the previous F-number.F/1.2 – the widest aperture apt for night shooting.The widest aperture possible is F/1.2, but, again, it also depends on the DSLR camera and its lenses. The maximum pupil would be 1 (as 1:1 proportion means 100% wide open blades), but it doesn’t exist. Quite logically, the largest aperture is defined by the lowest F-number. a proportion of the abovementioned blades opening. Let’s have a look at another definition which will help us understand the very notion of F-stop. Officially “f” stands for focal length, but for us as amateur photographers it makes no sense. That’s fine, but how does it correlate to F-number? Directly. Large apertures cause shallow photos with a blurred background, small ones give sharp and focused photos in which you can distinguish the finest details. On the other hand, an aperture defines the depth of field, and here the correlation is in inverse proportion. It means that, for example, for a night shooting you’ll need the largest aperture possible (and the lowest shutter speed, but that’s another topic). The wider the hole (aperture) is – the more light is let in. ![]() How it worksĮvery mechanical or digital camera has special blades which open at the exact width depending on the settings and the lens’s properties. Talking about F-stop in photography we just must say several words about aperture, as those two notions are closely connected and sometimes even interchangeable.Īperture, in brief, is a hole through which the light enters the cam and imprints onto the sensor or the film. ![]()
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