How to choose the camera? Part 2you will not envy the Beginning amateur photographers: to understand the huge assortment modern chambers - a complex challenge. We continue to consider characteristics of cameras which will help to choose suitable option.
Focal length. Simply speaking, this distance from the middle of a lens to a focusing point. At the majority of cameras it has variable value and is designated, for example, so: 5. 8-24 millimeters (the first figure designates the short end of focal length, the second - long). Why it is the nobility?
The lens zoom - in other words, extent of “approach“ of objects depends on a difference of focal lengths at a film. It is very simple to calculate its approximate value: divide “long“ figure into “short“. In our example 24 millimeters divided into 5,8 millimeters give 4,1 - that is approximately quadruple zoom. However, producers often specify in descriptions of amateur cameras directly a zoom so it is not necessary to count anything. It should be noted that it is about an optical zoom. You can not pay attention to the phrase “digital zoom“ is the mere words which are not bearing any value.
The big zoom is good for travel - it is not always possible to photograph any sight close. Not casually one of kinds of compact cameras - so-called “ultrazooms“ which offer 30-40 - multiple approach of object of shooting. But, as well as always, there is one dirty trick: the more the focal length - the is less than svetosil therefore at considerable approach objects on the compact device will turn out indistinct. Here - to remove an exit from a support, but who takes with himself a support in travel? And for studio shooting it is better to choose a “big“ chamber at which the svetosila of a lens usually is more.
Svetosila and photosensitivity. Svetosila is a characteristic of a lens, the maximum amount of opening of a diaphragm so is called when shooting. This indicator defines how many light will get on a matrix. Besides: the more - the better. Lenses reckon high-aperture with f/2,8 value above, and dark call lenses with f/35 value below. However the svetosila in itself does not guarantee quality of pictures. And if you are going to remove only at bright light or close with flash - you this parameter can not interest at all.
The photosensitivity is a characteristic of a matrix. It defines ability to form the image under the influence of light. This parameter is designated by the letters ISO. A standard indicator for compact cameras - ISO 100-6400 though in some models it reaches also ISO 12800. And here - again! - there is one “but“: with other things being equal the big photosensitivity gives more “noise“ - errors on the image. However at identical ISO value the big matrix will give less noise, than smaller. So upon purchase of “compact“ with a small matrix it is better to refuse a big photosensitivity - and to forget about good shootings in twilight. And here the large-size camera quite has a chance to have a matrix and the big physical size, and with a big photosensitivity.
View-finder. Here everything, apparently, is simple: it or is, or it is absent. But the view-finder of “compact“ and the reflex cameras view-finder is, as they say, two big differences. In the compact device the view-finder represents the usual window located, as a rule, above a lens - and therefore the image in the view-finder does not coincide with the image in a lens. In other words, at the exit we will receive not absolutely that we see. And the mirror camera therefore is called mirror that the image on the view-finder arrives directly from a lens through system of mirrors. But this system taking many place does the reflex cameras case such bulky.
Producers of cheap “compacts“ often at all save on the view-finder, suggesting to choose a shot only on the screen. Such way has the minuses: in - the first, the battery, in - the second quickly “sits down“, when shooting the screen is heated, and behind it also the matrix is heated that badly affects quality of pictures.
The rest. should not List other parameters within one article, probably, especially as you can independently deal with them. Convenience of the case, clearness of management, speed of inclusion and focusing, existence of “lotions“ like the optical stabilizer, shooting of Full HD of video or Wi - Fi - all this, of course, is important, but hardly has crucial importance at the choice of a camera.
What all - to choose? So, we will return to widespread designations of types of cameras - now they will help us to understand in what of devices we, most likely (but it is optional!) we will find a combination of parameters necessary to us.
The reflex camera is a big and heavy case, the mirror view-finder, a matrix big (in every sense) and the good range of interchangeable lens for every taste: with different focal length and different svetosily.
The non-reflex camera - almost the same, as mirror, only without system of mirrors, so, with the smaller dimensions sufficient, however, for installation quite big (however, all the same smaller, than at “reflex cameras“) matrixes. Such device also has a possibility of change of lenses, however their choice is still small.
The compact camera, it “soap tray“ - the small and easy case, not mirror view-finder or its absence, rather small matrix and a svetosila. Here sellers sometimes allocate the category “bonus compact“ in which carry small cameras with the improved characteristics - but at higher price.
- the camera subspecies having as it is simple to b to guess according to the name, an opportunity big - to 40 times - approximations of objects when shooting.
And for all these cameras one simple regularity works: the more the matrix, a svetosila and value of a zoom - the is more and heavier a chamber. And, generally, proceeding from it you also need to make the choice. Modern technologies so far, alas, did not offer other options.