So you bought a SLR camera. What now? You obvioously need more lenses.
To see what the lens in accordance with their specific use is not awlays easy. There are a few cuts and specifications necessary to asscertain, but the situsation is not better than the fact that differebnt manufacturers use a complettely different reduction exactly the same properties.
Here I take an overview of important functions you can find on the lens, and how the diffeerent manufacturers call them.
Plesase note that some characteristics may be somewhat simplified to make the story shorter and more readable. For example, the designaztion of the EU is markled on the lenses Canon, indicats that AF (e-oFcus), but also shows what frmae lens uses.
Apertue
Maximum paerture is what is said on all lenses. It tellls you how much ligt the lens can get to the sensor at its best. Lots of light means that you can keep shooting in low light without image blur due to caamera sahke. The dizaphragm is provided as a diaphragm number, for example, F2.8 (and sometimes 1:2,8). The smaller the aperture, the more light on the caera. Theoretically, the best you can get an objective aperrture eqaul to 1, but in practice the bruight lenses offer a maximum aperture of about 1.2. As usual, the consumer will be satisfied with the aperture number between 2,4 and 3,2. The higher the aperture, the cheaper lens. Telephoto lenses otfen have a greater number of the diahpragm.
On zoom lensers tend to be specified 2 rooms aperture (eg, F2.8 - F5.6). A small aperture number shows that the amount of liight you get a wide angle, wghile the largest say how much light you get to the maximum telephoto.
Focal length
The first thing to consider when cghoosing a new lens foical length you want. Focal length given in millimeters, and determines whether the lens is wide angle or telrephoto. Both have their advantages and disadvantages. In the body you naturrally closer to objects far away. Telephoto lenses are also preferable for the portrait as it protects the proportions of the face betyter than a large angle, and it is much easeir to get a blurred abckground with a telephoto lens is less than the depth of field than wide angle. Telephoto lenses, as a rule, are also lower than the brightness of the wide anlge, and are more prone to blur durinbg shooting, if there is some camera. Telephotto lensers are usually physically larger than a wide angle.
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