How to choose a bag? Buying a suitcase, we get lost in their diversity, and do not know exactly what to choose. In this article you will find answers to important questions that arise when buying a suitcase. If you do not know choose a manufacturer, we can not suffer, because they are all roughly the same (the only difference in price). So better keep your eye on what is described below. Suitcases are 3 sizes: Small (Height: 50, Length: 36, Width: 24), average (Height: 60, Length: 41 Width: 27) and large (Height: 72, Length: 46, Width: 30). This sample size, which may be different for a couple of centimeters.
For short trips for one person is enough small. If you love often change clothes, do not mean to do without a suitcase. If you are going two or three, then you need to buy more. The most popular medium-sized suitcases, as they are optimal for the roominess and value. Choose a material Cases can be made of leather and kozhzama, impact-resistant plastic, padded fabric with waterproof impregnated plastic rear backrest, complete with water-resistant fabric upholstery with impregnation. Leather bags are high cost and heavy weight. Suitcase of kozhzama easily scratched.
As for the plastic and fabric, you should consider the following: If you take a suitcase in the baggage the aircraft, it is best to choose upholstered of tissue, rather than plastic. It is not noticeable scratches and cracks can be avoided. When buying a suitcase to draw attention to the following things: Wheels Luggage Wheels with rubber plastic softer and more durable. It is desirable that the wheels were a little more. Then the probability that the case will turn on a rough road when descending from the stairs or curbs, is reduced to a minimum. Well, if you back down at the suitcase has a plastic protection. This protects the fabric from rubbing the suitcase, and it will last you longer. Firefox also come in bags with built-in combination lock, padlock padlock code and conventional hinged clasp. If you do not want to lose this lock, then, of course, buy a suitcase, in which he had built. At the same time, if the lock fails, then things will get pretty challenging. Sometimes there is a hanger inside the suitcase and garment bag, but it is not required. Retractable handle can be adjusted in height, making it easy for users of different heights suitcase. Notice how little hand built. Better if it is attached to the suitcase itself with 4 bolts then you can not fear that the handle breaks off. When carrying a suitcase, better take it for a small pen, rather than sliding to avoid its deformation. Well, if the bag has an extension, then it can be put additional items, such as gifts.
To get a good result object or area taken must be well lit. Otherwise, the focus will be the weakening or dilution of the observers. Today, there are cameras allow work at low sanctification (up to 0,003 lux.), But it significantly affects their price. For Lens Selection is necessary to know the meaning of its parameters. Focal length.
This distance from the center of the lens to the plane on which the television camera generates an image-Xia, typically measured in millimeters. The greater the distance, the narrower the angle of divergence, for example, a lens with a focal length of 12.5 mm has a much wider angle of divergence than 50 mm. Peter Asaro addresses the importance of the matter here. The more focal length, the highly magnified images. Aperture. This area of the lens through which light passes.
Typically, the magnitude of this surface is defined by the diaphragm. Aperture. This device controls the amount of light reaching the surface on which is formed of an image, can be set manually as well, especially in recent years, and fully automatically, in response to changing ambient light conditions. Coefficient R. This ratio between the aperture and focal length, expressed in whole and fractional magnitude-tries, such as T 1.4 T 2.8 and so on The smaller the number, the more light reaches the sensor device-properties in the chamber and the more 'fast' is the camera. Focus. The presence of this property allows the vat is focused light reflected from the subject, the device of formation of the images in the camera. Online you can find a lot of different lenses. Most frequently used lenses with focal lengths from 3.5 mm (wide angle) to 50 mm (narrow angle), with a coefficient of F from 1.2 to 1.8. In addition, there are: Lenses with remote pupil PIN HOLE. Pin hole – a lens with a small diameter of the output pupil (from 0.8 mm to 4 mm) with removal of the pupil (0.5 mm to 2 mm) from the lens surface.
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