9/3/2023 0 Comments Portrait with bokehA very busy distracting background will not contribute to a peaceful picture. This will be defined by the choice of our position and viewpoint. The more room you have for this, the more blur you can create. Things do not immediately go from sharp to blurry but this happens progressively. To get a good result, you need some distance between what you are focusing on and what you want to be blurred out. The first step in obtaining a blurred background is to use a large aperture, but there is more. Tree frog (1/100 sec, F/5.6, 105 mm, ISO 200), distance to frog 1 m, distance to background 2m, Guy, Belgium, 2018 Distance A wider aperture should give us bokeh, a fancy name for a softer, blurry background with light spots. So, after choosing the lowest possible F-number, we focus on our subject of course. The photos that I added to this blog however show that with F-numbers of 4 and above, bokeh is still possible. When using a lens that has a changing maximum aperture for example of f/3.5 -5.6, this means that the maximum aperture when you are zoomed all the way out is f/3.5, but as you zoom in the maximum aperture setting gets higher and higher until it reaches f/5.6. The one-stop difference also means a doubling or halving of the amount of light let in when taking a photo. That is because the F-number is expressed as a fraction: an aperture of f/2 is equivalent to ½ (one-half). It is probably counter intuitive, but the lower the F-number the larger the aperture. Landscape photographers usually don’t mind using a narrower aperture like f/8 or f/16 so that all parts of the image are in focus. This technique is heavily used by portrait photographers. Keep in mind that the aperture controls the amount of light entering the camera sensor and that will influence the shutter speed to obtain the proper exposure. There is one exception and that is 50 mm lenses, which you can find fairly cheap for F-1.8. There is a direct correlation between the maximum aperture size and how much the lens costs. There are lenses with f/1.8 or 1.4 or even 1.2 around but the lower the f-number the higher the price. The use of a wider aperture (lower f-stop number) lens such as f/2.0 or f/2.8 increased the capabilities of the lens in comparison with F4. The aperture is the opening in the lens which allows light into the camera, measured in f-stops. So, it will depend on the f-stop possibilities of your lenses. You want to use the smallest f/number that your lens allows. You probably know that getting a blurred-out background or shallow depth of field(some call it bokeh) depends on your aperture setting. Tree frog with bokeh in the background (F/4, 55 mm, 1/17 sec, ISO 200), distance from the frog was 1.5 m, distance to background was 2.5 m) Costa Rica, Guy, 2019 Depth of field We do this while optimising the composition and possibly placing the focal point in the frame based on the rule of thirds. The more colour and light spots in the background, the more visible the bokeh effect. Bokeh comes from the Japanese word “boke”, which means blur or haze. When you add bokeh outside of the depth of field, magic happens. One big category of landscape photography where blur or bokeh can add a lot to your photograph is in nature and macro photography. We will achieve this while playing with the depth of field (DOF) that is defined as how much of an image is acceptably in focus (sharp). We will do this in cases where we want our subject to stand out, get all the attention, and make sure it doesn’t get lost in the background. This opens a new door to creative pictures. They use all possible techniques to achieve this like, using the focal distance, cameras, or lenses with in-body stabilisation, tripods, wire release, remote controls, folded mirror, or even by focus stacking (combining different images with a different focus distance) etc.īut there are occasions, that, at least part of the image can benefit from intended blur in your picture. Usually, landscape photographers strive always for the highest possible sharpness from the front to the back in their photos.
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