The Goal – How It’s Done And Focal Lengths
The goals are the most important component of the camera in addition to also be the most expensive economically. Composed of a set of lenses, the latter can be constructed in different materials (in mobile are plastic) and they can be applied to different treatments. In operation, therefore, the material, treatment, processing and the number of lenses in perspective, the price can vary from a few hundred euro up to tens of thousands. It goes without saying that the interests of poor quality will return results qualitatively poor quality … but the combination price is not always the case you can find on the market of the objectives from the very low cost but by excellent performance as well as the super expensive lenses can, in certain situations, to be almost useless.
This is due to the fact that there is not an objective, but the objectives http://www.akusewa.com/sewa-backdrop-jakarta. You will never see a photographer shooting with only one goal, often with him there will be at least another couple, in order to cover all the different conditions that can be found before the tele, wide angle, the fixed optics. All targets that excel in their field of application but which, when used out of context, can create more than a few headaches. The example that I always do is that of fixed lenses inexpensive because of the few elements, they offer a very high brightness and are perfect for pictures in places where flash is prohibited, as well as for portraiture. But try to photograph us a panorama you will be disappointed.
We have already introduced the objectives in Article Targets – General. Let’s now in more detail and see how is made and what are the different types of targets present on the market.
First of all, we observe a target a first analysis we can identify the functions available on the outer body. In the part more distant from the camera there is the ring of connection to the filters over which the lateral groove for the use of a lens hood. Moving toward the body, we find the ring of focus (always present), the distance scale (zoom, if it is a varifocal lens), the aperture ring (in some goals, especially in dating since in digital SLR the diaphragm is controlled by the machine body), and then the graft, bayonet or screw (depending on the brand).