Red-eye is caused when light from a flash bounces off the rear of the eye and back into the lens. Red-eye is at its most pronounced when the pupil is open wide and the flash is close to the camera lens. To reduce red-eye, move the flash away from the lens – ideally directly above – and try to make the pupils contract by increasing the ambient light or using a pre-flash or some other red-eye reduction method.
When you move back from your subject, the red-eye effect becomes more pronounced because the angle between the flash and the lens becomes smaller so that it is virtually the same, and this means the flash is firing directly into the eye.
The level of reflection can be quite high – like cats’ eyes. There is also a spreading of the light, making the white disc seem to take up the whole of the eye, which is a nightmare to correct through image enhancement.
On-camera flash is really only effective up to a distance of about ten feet. Try to avoid taking flash photos of people beyond that distance.
Looking at images on the web, I notice a huge range in image quality. A key factor is sharpness, and many photographs appear less sharp than they ought to be. People often say that my images are bright, punchy and appear to ‘jump off the screen’. The reason for this is careful manipulation of the sharpness.
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Like spectacles and contact lenses, camera lenses are manufactured with a special antireflective coating that helps to improve image quality. This multicoating is designed to improve both contrast and colour reproduction, yet is easily affected by grease from fingers. Once smeared with a tiny amount of natural oil from your skin, the performance of a lens drops dramatically, creating flat contrast images with washed-out colours.
If your lens does get inadvertently greasy, clean it only with special lens-cleaning tissues or, for more serious cases, an alcohol-free spectacle wipe. Tiny specks of dust, sand and human hair will reduce your image sharpness and this should only be removed by using a blower brush, available from all photographic retailers, or a soft artists’ paintbrush. Any grit or sand that comes into contact with your lens can potentially etch a permanent
Digital cameras use autofocus to remove the human error out of taking a picture. Most cameras have an autofocus target in the centre of the viewfinder that is best placed over the main subject and this works faultlessly – providing the subject is centrally placed. Autofocus is activated by half-depressing the shutter button and placing your subject in the centre of the frame, until a green confirmation light appears in the viewfinder display.
Autofocus is unable to focus on low contrast subjects like large areas of flat colour, and will track the lens back and forth in error. Solve this problem by recomposing and focussing on an edge of the subject, then pressing the autofocus lock on your camera. The lock holds the focus setting in place, so you can recompose and shoot more creative results.
Another common autofocus problem occurs when a subject falls outside the central portion of the frame and the camera sets focus on another object in the distance by mistake.
The telephoto lens
At the opposite end of the scale is the telephoto lens, loosely described as anything with a focal length greater than a standard lens. The telephoto is most useful for making distant subjects much bigger in your viewfinder and cropping out unwanted peripheral detail.
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Understanding exactly how a camera lens works is the key to more dynamic photographs. Tim Daly shows how the design and specification of a lens can determine the kind of subjects you can tackle with confidence
A lens is described by its focal length in millimetres such as 50mm or 18mm. The angle of view (how much of the scene can be seen through the lens) has a direct link to this focal length. In the familiar territory of the 35mm film camera world, a 50mm lens is referred to as a ‘standard’ lens because it comes close to giving the same angle of view as the human eye. In the digital world, lightsensitive image sensors are physically smaller than 35mm film and the equivalent standard lens has a much shorter focal length. This month we take a look at the different lens types (each lens usually has information on the focal length printed on its inner rim) and how they affect the photos you capture.
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A firm favourite with motorsports enthusiasts, the technique of panning conveys all the drama and excitement of a finely-tuned machine at top speed. Panning works when the camera tracks the position of a moving object during exposure.
The panning technique is based on a slower shutter speed and needs to be practiced. Arrange your shooting position so that the moving object passes from one side of your viewfinder frame to the other, and select a shutter speed of 1/15th of a second. Press your shutter just as the moving object appears and immediately follow its path by moving your camera. As the shutter closes, the resulting image will display a sharpish moving object against a very streaky background. The same kind of effect can be applied to the backgrounds of frozen movement photographs using the Motion Blur filter in Adobe Photoshop and Photoshop Elements
Many people are in trapped of debt. It can be in the form of an auto loan, a mortgage, a student loan, or a typical credit card balance. Having a deb’t isn’t a bad thing actually, as long as you are taking the steps necessary to pay. The thing that can cause unhealthy financial life is having too much debt. You should take some time to determine whether or not you have too much debt. It would provide you with information whether you are doing things right or to understand that some financial changes are required.
Get a debt help might proven very useful. But the bottom line is we should keep some good behavior such as the following three:
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The urge to buy gadget and accessories for your Digital Camera can lead you into an impulsivity. When this happen, payday loan might look like the best options there are. However, getting a payday loan can actually become a disaster if you don’t know enough about it and can’t handle it wisely. That’s why you should note the following tips:
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The problem occurs most frequently with digital compact zooms set on the telephoto end of the scale, and especially in low light conditions. As telephoto lenses capture far off subjects, any slight body movement will cause the viewfinder image to change composition dramatically. Camera shake can be solved by setting a shutter speed of 1/125th of a second or faster, but if you haven’t got faster shutter speeds can’t be used, use a tripod or steady yourself against a wall. Ultra-long telephoto lenses used on digital SLRs need a minimum 1/250th to offset the increase in camera shake because of the extra weight and awkward balancing involved. If light levels are too low to use a fast shutter speed, make your ISO higher or use a flash instead.
