Lenses with focal lengths below 50 millimeters are considered wide lenses.
Various digital SLR lenses are available for your camera. Some are suitable for casual outdoor use with bright natural lighting, and others are built to meet more demanding low-light conditions like concerts and indoor events. Nature photographers, for example, will often choose different lenses than portrait photographers. Choosing the right digital SLR lens involves matching the right lens mount, quality and flexibility preferences, subject distance considerations and light-gathering ability.
Instructions
Lens Mount and Series
1. Check your camera's brand and model to verify lens compatibility. Most lenses are compatible with lenses that are the same brand. However, brands produce lenses in different series, and some series are not compatible with some cameras. For example, Canon produces a series of EF-S lenses that are not compatible with some Canon cameras. Check the technical specifications for a lens you are considering to verify that it is compatible with the model of your camera.
2. Decide between prime or zoom lenses. Prime lenses are fixed focal length lenses. Zoom lenses have variable focal length. Prime lenses often produce images with superior image quality, and tend to weigh less than zoom lenses. Zoom lenses provide focal length flexibility, and may replace the need for several lenses. Zoom lenses are usually appropriate for beginners, hobbyists and freelance photographers, because they increase the photographer's flexibility without the cost of additional lenses. Prime lenses are often suitable for commercial photographers, high-end portraitists and fine art photographers, because the superior image quality can accommodate large print production.
3. Choose the right focal length. The focal is the lens’ distance of focus, and it determines the lens’ angle of view. Short focal lengths under 50 millimeters are considered wide lenses, because they provide a wide angle of view. Long focal lengths over 80 millimeters are considered telephoto lenses, because they make subjects at greater distances appear closer by narrowing the angle of view. The choice between short and long focal lengths usually depends on the camera’s distance from the subject, and the amount of the surrounding environment that is part of a shot.
4. Pick the maximum aperture. Large or wide maximum apertures are indicated by lower f/numbers on the lens, like f/1.4. Short or narrow maximum apertures are indicated by higher f/numbers like f/3.5. Wide apertures have greater light-gathering ability than narrow apertures, and wide aperture lenses are usually more expensive than narrower aperture lenses. Wide apertures are good for low-light conditions, stop-motion photography and fast-moving subjects. Narrow apertures are suitable for outdoor daylight photography and flash photography, or photography with artificial light sources.
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