Photography class presentation - AWCL Photography group

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Lesson 1 - AWCL Photography group

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<ul><li>1.Photography How to go beyond Point and ShootPresented by: Heather Jones</li></ul> <p>2. How to go beyond Point &amp; Shoot The three main areas that you can adjust are:Aperture, Shutter speed, and ISO. 3. Aperture What is an "aperture" ? Aperture is referred to the lens diaphragm opening inside a photographic lens. The size of the diaphragm opening in a camera lens REGULATES the amount of light that passes through the camera the moment when the shutter curtain in camera opens during an exposure process. Aperture size is usually calibrated in fnumbers or f-stops, like f22 (f/22),16 (f/16), f/11, f/8.0, f/5.6, f/4.0, f/2.8, f/2.0, f/1.8 etc. 4. Aperture A visual referenceSource: http://www.mir.com.my/rb/photography/fototech/apershutter/aperture.htm 5. AperturePhoto credit: http://www.theverge.com/2012/1/2/2663464/camera-buyers-guide 6. Aperture and Depth of Field (DOF) Depth of field is just technical term used to describe the 'zone' of sharpness' between nearest and furthest of a subject in focus (to be more exact, distance of sharp focus in front and behind, subject on which the lens is focused). There are a few elements that will affects Depth of Field in a picture (Note:- Factors on lens ONLY, shutter speed never affects depth of field): 1. The lens opening (diaphragm inside the lens) - the bigger the apertures used, the zone of sharpness is shallower or vice versa i.e. smaller aperture used will has extended depth of field 2. The focal length of the lens (50mm as standard, 80mm above as telephoto; 35mm or shorter as wide angle) wide angle lenses have extended field of sharpness than a longer focal length telephoto lenses and/or longest reach focal length on your zoom lens), and 3. The distance from the lens to the subject - the nearer the subject is, the shallower the zone of sharpness and vice versa. 7. Depth of FieldF 2.8F 5.6(All taken with a 200mm lens) Source: http://tricksnclicks.com/aperture-dof/F 8.0 8. Shutter Speed Shutter speed is the amount of time that the shutter is open. Shutter speed is measured in seconds or in most cases fractions of seconds. The bigger the denominator the faster the speed (ie 1/1000 is much faster than 1/30). In most cases youll probably be using shutter speeds of 1/60th of a second or faster. This is because anything slower than this is very difficult to use without getting camera shake. Camera shake is when your camera is moving while the shutter is open and results in blur in your photos. If youre using a slow shutter speed (anything slower than 1/60) you will need to either use a tripod or some some type of image stabilization (more and more cameras are coming with this built in). 9. Shutter Speed Some cameras also give you the option for very slow shutter speeds that are in not fractions of seconds but are measured in seconds (for example 1 second, 10 seconds, 30 seconds, etc.). These are used in very low light situations, when youre going after special effects and/or when youre trying to capture a lot of movement in a shot. Some cameras also give you the option to shoot in B (or Bulb) mode. Bulb mode lets you keep the shutter open for as long as you hold it down. When considering what shutter speed to use in an image, you should always ask yourself if anything in your scene is moving and how youd like to capture that movement. If there is movement in your scene, you can freeze it (so it looks still) or let the moving object intentionally blur (giving it a sense of movement). 10. Shutter speedSource: http://www.exposureguide.com/exposure.htm 11. Slow shutter speed to portray movement (motion blur):Photo Credit: H.C. Jones Photography 12. Fast shutter speed to freeze movement/action:Photo Credit: H.C. Jones Photography 13. ISO (or film speed) ISO is the level of sensitivity of your camera to available light. The lower the ISO number, the less sensitive it is to the light.The higher the ISO number increases the sensitivity of your camera to light. With increased sensitivity (higher ISO), your camera can capture images in low-light environments without having to use a flash. But higher sensitivity comes at an expense it adds grain or noise to the picture. The most common ISOs are: 100, 200, 400, 800, 1600, and 3200. 14. ISOSource: http://www.exposureguide.com/exposure.htm 15. ExposureSource: http://www.exposureguide.com/exposure.htm 16. Rule of Thirds The basic principle behind the rule of thirds is to imagine breaking an image down into thirds (both horizontally and vertically) so that you have 9 parts. With this grid in mind, the rule of thirds now identifies four important parts of the image that you should consider placing points of interest in as you frame your image. 17. Rule of ThirdsPhoto Credit: H.C. Jones Photography </p>