Lens:
In this topic, we will discuss what is Lens, Structure, Characteristics, and Various types of lens are.
What is Lens? A piece of glass or plastic has two opposite surface that is used to correct vision problems, change and converge light rays, and magnification light. It can be in a different size.
Structure of a Lens:
It is made by small units of glass, which are stored aligned inside of a plastic cylinder. We can zoom the photo by moving these elements from back to front.
The Basic Characteristics of a Lens:
Focal Length: It is the distance, from how much far the lens can capture a photo and its unit is millimeters (mm). That means the lens captures the photo from the distance as much as the focal length and by the low focal length, the lens can capture a wide photo.
Now, if there are two cameras and if one has 18 mm focal length and another has 180 mm focal length, which one will draw the subject closer to the lens, and how many times? It will be 10 X. X is the symbol of zoom. Though this is correlative. Such as if the focal length of a camera is started from 20 mm then 10 X zoom express the focal length can be changed from 20 mm to 200 mm. Similarly, 10X zoo of a 35 mm camera means that it is spreader to 350 mm.350 mm focal length can draw a photo closer than 200 mm focal length.
A good lens can capture good Photos
Some photos of different focal lengths:
- Photography with 16 mm Focal Length: Firstly, Captured by 16 mm Focal Length
Captured by 16 mm Focal Length
2. Photography with 50 mm Focal Length: Secondly, Captured by 50 mm Focal length. The 50 mm focal length has a specialty that can capture the subject of the attention of the eye.
Photography with 50 mm Focal Length
3. Photography with 50 mm Focal Length: Thirdly, Captured by 200 mm Focal length
Photography with 50 mm Focal Length
Focusing Perfect Point for Object for Capturing Photos :
If you want to capture a photo light must be entered through the lens. If the lens focus on a definite point the subject will be sharp from another subject. In our childhood, we tried to burn something with the “Heat Glass”. That means we tried to reflect The Sun at a point. As much Heat will produce as we can make the light centralized.
The rays meet together on plane 2. So the subjects of this plane will be clear in the photo and the subjects of plane 1 will be more unclear than others. So the focusing point of a camera will be the clear most.
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