Tele Lens13 March 2019
Lens selection according to the intended use. In this article our subject is tele lens.
What is a tele lens?
What are the advantages, which areas are used?
What to look for when buying a wide-angle lens etc. I will try to answer these questions in this article.
First of all we have to warn the readers, angles and measurements are calculated according to the sensor machines with 35 mm dimensions which we call full frame. In crop sensor machines, it is calculated according to the crop size of the machine. It is usually 1.5 multiplied. That means we see 50 mm lens crop sensor as 75 mm. The lens closest to the standard eye is 50 to 55 mm. Its below is called the wide angle and the top is called the tele lens. Starting from 70 mm, up to 2000 mm.
With the developing technology, companies started to produce apsc (cropy sensor) machines which are easy to carry and use for amateur users. Machines with cropy sensors are advantageous for using tele lens because they have a multiplier of 1.5. In a 70 mm lens, we see as 105 mm. This gives us advantages in need of tele.
The advantages of tele lenses allow us to shoot objects at a distance more easily, so we don't have to get close to the object, we can shoot the object we want from long distances. Tele lenses do not cause corner distortions in wide angle lens.
Tele lenses are generally used in many areas like sporting events, nature documentary shooting, portrait photography, product photos, etc.. There should be some points to be considered when using, the instantaneity should be as high as possible. The slightest jolt can cause the subject to blurred out. That's why shooting with using tripod allows us to achieve healthier results. Another point to pay attention is that the depth of field does not occur in point photographs. Everything in front of and behind the object is blurred, this provides an aesthetically beautiful view. It brings out the object we will shoot.
Using a tele lens for portrait shots allows us to achieve healthier results. The reason is that the lens provides an equal amount of reflection to each point. Deformation does not occur in the corners so that it provides to shooting the opposite person's body and facial contours with the nearest measurements.
Another advantage of the tele lens is that we bring the background closer with the object we shot. If we can explain this with an example. We want to take a photo at the back with a beautiful view, but the view is very small and unpretentious. If we take the picture with the tele lens, we can make the view even closer, we can show the frame more full. Restaurants, cafes that want to put forward views use this advantage of tele lens, thus the view becomes more attractive.
Another point we need to pay attention to when buying a tele lens is its autofocus feature. The better the focus speed, the better the results. For example, we're shooting a sporting event, because we can't think the instantaneity inside, we open the diaphragm to get light. The advantage of opening the diaphragm is that all the objects in the back are blurred, so our object comes to the fore. The disadvantage of this is that it is difficult to capture the object clearly, in this point the autofocus feature of the lens comes into play and the more rapid and successful it is, the more it relieves. The same conditions apply to shooting wild animal in nature photography.