Camera Zoom Lens
It is useful to think of telephoto lenses and telescopes for their digital SLRs. Like a telescope, a telephoto lens extends the theme bringing and making it appear larger in the viewfinder and the sensor digital camera.
Lenses with a focal length longer than a standard target 50 mm can be ordered and telephoto lenses. In practice, however, 85 mm is considered as the shortest focal length telephoto or principal fixed, while for telephoto zoom lenses, the short end of the telephoto range starts about 70 mm, as in a 70-200mm telephoto.
Over the length of a lens, the greater the enlargement. Thus, a 100 mm telephoto lens gives twice the extension of a 50mm lens. In practice, this corresponds to the subject's height and width in the viewfinder – and thus the digital sensor or film – is doubled when you connect a 100 mm lens to the camera photo. Similarly, a 400mm telephoto lens provides eight times (8x) the extension of a standard lens.
If you are in Safari and it is a look at big male lion you 50 meters, it will seem very small in the viewfinder 50 mm lens on your DSLR. A change that a target of 500 mm telephoto lens, and the lion is expanded 10 times. Now that almost fills the frame and you can even see the eyes scarred face and piercing Yellow set on you.
In the example above, should be clear that the tele very valuable when it can not be near enough to the subject you're photographing. With a telephoto lens may, for example, taking pictures of sports on the sidelines or take pictures of wildlife from the safety of a vehicle or hide.
They are also very useful to take spontaneous photos of children, the report or any other situation where you want pass unnoticed, they can get noticed while you're at a certain distance from the subject.
Medium telephoto in the range of 85 to 105 mm are also very important as portrait lenses, since they tend to flatter the area and offer a depth of field resulting in diverting funds AFH.
V prime telephoto zoom lenses
The lenses are divided into two main categories:
1. Fixed focal length, or prime, telephoto
2. Telephoto zoom lens offering a focal length variable
1. Prime telephoto offers an optimal image quality because they have fewer lens elements, commitments so that less should be made. Its main drawback is the fixed focal length, which limits their options when composing the shot.
When shooting moving subjects, as in sports or wildlife, you can suddenly find a subject that threatens too much in the viewfinder. Fixed focal length lenses telephoto lens can also be large, heavy and costly.
However, they are the first choice for professional sports, news and wildlife photographers because the image quality unmatched and provide broader objectives maximum aperture equivalent focal length zoom.
This allows shooting in low light, which is often a necessity for professional photographers in the following situations:
* Shooting sports under artificial light at night or indoors;
* The wildlife photographers to shoot early morning or evening when the animals are most active and light is softer and less contrasting;
* Photographers Press while filming in a variety of new situations last hour, when it may be too far from the object using the flash or if you want a more natural images with available light.
Within the family telephoto First, some of the most popular are:
* 600mm f/4.0 – for wildlife and sports as surfing and cricket, where these broad objectives can be securely mounted on a heavy tripod for stability.
* 300 mm f/2.8 – a brilliant lens for wildlife and sport because of the maximum opening width combined with a smaller size and weight, it is easier to use on a monopod, which gives the photographer greater freedom of movement. These lenses can also be used with the corresponding tele-converters or extender to increase the focal length without sacrificing size or weight.
* Portrait with 85mm lens at maximum aperture of f/1.2, which are also good for indoor sports or low-light situations, such as concerts and theater.
2. Telephoto zoom are very popular because of its versatility and affordability often. The lens technology has improved considerably in recent years and higher than today-of-the-wide zooms are compared favorably with the Prime lens when it comes to image quality.
For all round utility and affordability and acceptable image quality, telephoto zoom is a must-have "lens for most photographers because it is much cheaper to buy a zoom of two (or three) PRIME LENS to cover the same range of focal lengths.
Popular telephoto zoom include:
* Professional quality 70-200mm f/2.8 telephoto
* 80-400 and 100-400 f/4.5-5.6 Telephoto Zoom
* More affordable 70-300mm f/4.5-5.6 telephoto.
Whatever the tools of their situation, photographer beginner or a veteran, telephoto lenses are invaluable to increase the chances of capturing great images with your digital SLR.
What a good zoom lens for a Nikon D40?
The lens of the D40 comes with a 3x zoom and I do enough. What that a good zoom, bearing in mind I know very little about cameras?
Take the (excellent) objective of the package (plastic mount) and get the 18-200mmG VR. It's the only thing you need to aim for the D40. Http: / / www.flickr.com/photos/29812779 @ N03/sets/72157618474802682 /
Fuji S100fs digital camera zoom lens review
