Tim shot the Croatia “hole in the wall” using a small aperture, to get everything in focus from foreground to infinity. How does this affect travel photography then?Īlly shot this steam train handle glow, with a large or wide aperture (f2.8) to isolate the handle from the details in the steam. As the aperture is very small, the out of focus area will be small too. The focus point is in front of the film or sensor plane. The light comes from the scene, goes through the lens but is out of focus. As the aperture is very big, the out of focus area called the circle of confusion will be big too. The light comes from the scene, goes through the lens and the wide aperture and focuses to a point on the film or sensor plane. This diagram shows how bigger apertures make the out-of-focus areas more blurry So how does it work – The Tecky Geeky stuff Doing this ensured that the background is thrown totally out of focus.įor the right image I used a small aperture f16 so the background is more in focus and is less visually pleasing. ![]() The smaller the aperture, the greater the depth of fieldĪs a gross generalisation, people photography works well with wide apertures where you want to isolate the person from the background, whereas landscape photography works well with small apertures where you want everything in focus from foreground to infinity.ĭrag the slider to see the difference between f4 and f16įor the left image of Ally, I used a larger aperture f4. This means that out of focus areas will be more out of focus which allows you to isolate subjects away from their background The wider the aperture you use, the narrower the depth of field. While the kit lens that comes with the camera usually has very good middle sharpness at most apertures, the images are not so sharp in the corners and especially so at wider apertures.Īperture can be controlled from either the lens or in the camera.The more expensive pro lens probably has better correction for colour fringing – chromatic aberration.The kit lens is often made of plastic, whereas the professional lens needs to take a beating and so is usually made of metal.Other factors also affect come into play. The aperture is usually wider on the pro lens. What is the difference between a “pro” lens and the kit lens that came with my camera body. So why not shoot with very small apertures? Well the light is diffracted by the edge of the aperture blades causing the image to be less sharp.Ī prime lens (not zoom) will usually be sharper than a zoom lens. Not to get too technical but less expensive lenses are corrected for sharpness better in the middle than at the edges. If you want really sharp images, shoot in the f5.6 to f11 range. The number after that is the lenses focal length. A wide aperture lens is usually heavier and more expensive than a smaller aperture.Īll lenses are different but this lens shows the f-stop of 2. Of course larger maximum apertures come at a price. The bigger the maximum aperture, the more light can come in and the lower light you are able to photograph in. The lenses are usually advertised with the maximum aperture value so for example you might have a zoom lens that says 24mm-70mm f4 – f4 being the widest aperture of that lens. So f.5.6 allows double the light through than f8. Each full f-stop is double (or half) the light of the next stop. The light that comes through the aperture is measured in f-stops. The quality of the out of focus area is known a bokeh. The number of blades (and if they are straight or curved) will affect how the out of focus areas look. Small aperture means the hole is small (less light enters).ĭifferent lenses have different numbers of blades. Wide aperture means the hole is big (more light enters). The hole can get bigger or smaller because it is made up of a number of blades. The bigger the hole, the more light that comes through onto the film or sensor. ![]() The basics of aperture The hole that changes sizeĪperture is the hole in the lens that gets bigger and smaller depending on your settings. Come with us on an enjoyable journey down the exposure rabbit hole while we explain what aperture is, and how you can change your camera settings to create exceptional travel images. Of course, aperture also enables lots of creative ideas to be realised. In this article we will look at how it affects the image in so many other ways. 0 Likes What is aperture – why it is important to travel photographyĪperture is one of the ways we control how much light gets to the film or sensor but it is is just so much more useful than that.
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