Expect the lens on the basis of its technical features.Today there are many types of lenses, among which the most common are: "fisheye" wide-angle lens, "whale", the usual (normal) lens portrait lens, macro lens and a telephoto lens.
If your eyes are the lens of the "fish-eye", pay attention to the feature of this device.Lenses of this group have a wide angle of coverage rented space: in fact, on the diagonal "kropnutyh" frame, these devices out of the competition.Among the representatives of this group have lenses with a focal length of 4.5 mm.
Note the wide angle lens: its viewing angle is 90 degrees.With only a single drawback compared with the "fisheye" - half the angle of view, this type of device does not distort the image.In addition, the wide-angle lens when shooting a subject at close range or at a certain angle, visually "squeezes" the image, making it a wide-angle, making it easier for your eyes to perceive.
If you opted for the lens 'whale', consider the fact that in terms of functional devices of this group are good: they can be used to shoot the situation inside and portraits, we need only to correctly configurethe zoom ring.Outside the equivalent focal length of the devices of this category is 50 millimeters.Compared with devices such as "whale", "normal" lenses have less EGF, in view of this, they are designed primarily for learning and not for professional photography.
indispensable macro lens when shooting microcosm.In describing the devices of this category used this argument as a "minimum focusing distance": The value of this parameter should be less than 5 centimeters.In contrast to this type of lens, long-focus lenses used to shoot objects at a distance.
Note the portrait lenses.Unlike other devices, they can be of particular significance equivalent focal length.In portrait lenses, this figure varies between 85-120 mm.
no mistake with the choice of lens.All your data is in its accompanying statement.
The calculation of the lens, and take into account the aspect ratio of the focal length required to obtain the desired image field.
- camera lens