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A few lens adapters are threaded so that they can be screwed onto the camera. Some others may have a bayonet mounting. Lens adapter is often used with step-up and step-down rings. This means that accessories and filters of other sizes can be attached to the camera. You may even use accessories of a specific size that are a different size from the diameter of the lens. A lens adapter has to be designed specifically for your brand digital camera. Ensure that it does not cause any kind of vignette at all focal lengths. Always read your camera manual for instructions about mounting and dismounting the lens adapter correctly. The manual will provide the right information as to whether or not the lens adapter can be left on the camera at all times. In case you plan to keep the lens adapter attached to your camera, ensure that your camera bag has sufficient space in order to fit it properly. At times swapping lenses will require a lens adapter in order to make things fit. Digital single lens reflex or DSLR cameras use changeable lenses just like the non-digital SLR cameras. In fact, all the lenses that can be used on film SLR cameras also work on DSLR cameras. Lens adapter allows you to connect lenses of one size to cameras of another size. Besides using digital imaging to capture the photos, DSLR cameras tend to function almost identically to film SLR cameras. These make use of the same lenses and take in light in the same way. The single lens reflex is a small mirror, which is able to reflect the light that is coming through the lens up at a mirror and then through a prism to a viewfinder. Most lenses tend to provide a set viewing angle. This angle is the size of the angle from the edge of the field of vision to the other edge. A wide-angle lens may allow a 180-degree viewing angle, while a narrow angle may only give 20 or 30 degrees. Lenses tend to screw into threads on the camera. Lens adapter is a short tube that has threads on both sides. Thus a lens adapter screws in before the lens, attaches to the camera, and then a lens screws into the adapter. This offers a different size thread than the camera had originally. In case you want to use lenses from a different maker, you will probably need a lens adapter.
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