![]() ![]() ![]() A poor lens is not as sharp, and it may exhibit chromatic aberration, Lenses with the same focal length and aperture can differ substantially in Good stabilizationĬan make a remarkable difference in sharpness of handheld shots at extreme focal Better cameras haveĪ stabilized lens, that compensates for camera shake. Bright sunlight helps,Īnd a tripod or monopod can do wonders. It is hard to hold aĬamera sufficiently stable at a focal length of 300 mm. Long focal lengths present challenges for photographers. You have transferred it to your computer.) You can always crop an image in software after (Important: ignore "digital zoom" specifications in ads. Extremeįocal lengths let you get in real close to the action even from the sidelines Or a shot on the soccer field where you child is actually recognizable. Long focal lengths mean you can get a tight photo of your children's faces, These generally have a minimum focal length of around 25mm, but these usually have a much 35 mm is a modest wide angle, and 105 mm is a modest telephoto.Ī few cameras have extreme zoom ranges of 8X, 10X, or even more. Many digital cameras have a 3X zoom, with a focal length range from aroundģ5 mm to 105 mm. In the subsequent discussion I am using 35-mm equivalent Has a 3X, zoom, it means that the longest focal length is 3 times the shortest. Of these and everything in between into a single adjustable lens. Tight photo of a distant object or person. A long focal length is a telephoto lens, allowing you to get a A short focal length is a wide-angle lens, great for taking in The focal length determines the magnification Lens focal length or zoom rangeĪ zoom lens has a variable focal length. A large aperture lens gives you that option. Sometimes you want everything in focus, but sometimes you would like a shallow depth of field to separate the (sharp) subject from the (blurry) background. Depth of field is the range of distances for which objects are in reasonable focus. These twenty shots with flash disabled, and you will get much better candids.Ī large aperture lens also gives you the option of having a shallow depth of field. You shoot 20 flash photos in ten minutes. Photographers tend to shoot a lot of photos, and you can drive people nuts if You can also take a lot of photos less obtrusively without a flash. Indoors without flash, and these look a lot more natural than flash photos. I really like to have a fast (large aperture) lens. You would rather haveĪ lens that is f/2.0 than a lens that is f/4.0. Thus, smaller numbers mean bigger lens openings. Of f/2.0 literally means that the lens opening is half the focal length f of the Lens aperture is measured in f/numbers, such as f/2.0 or f/3.5. If you like to take photos indoors without flash or from a reasonable distance. Is the most overlooked lens specification, but it very important, especially More light is gathered, and the less light you need to take a good photo. The aperture of a lens is its maximum opening. So do not make camera resolution a decision point in your camera selection. With such resolution, your image detail will only be limited by sensor resolution if you have everything else about your shot absolutely perfect: a great lens, held very steady, precisely focused, on a subject that is stationary. Virtually all digital cameras have resolutions of more than 10 Megapixels. Today, a camera's resolution is that last thing you should be worried about. The resolution is the number of pixels in the captured image.Ĭomputer images are divided into little dots called pixels. Nearly all digital cameras use CMOS or CCDs as the sensing element. Lens aperture, lens focal length / zoom range, lens quality, sensor sensitivity, and camera software. The quality and composition of a digital camera is mainly defined by four quantities: resolution, But before getting into the trade-offs between these categories of cameras, let's briefly discuss what determines the quality of the images you shoot. Picking among the above is your most important decision. Introductionĭigital cameras mostly fall into a few broad categories: For a more modest price and for a smaller, lighter, more convenient system that gives full creative control, consider a superzoom. If you are looking to move beyond your smartphone camera, you should choose a DSLR or mirrorless camera for the ultimate quality. How to choose a digital camera BLUF (bottom line up front) ![]()
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