Traditional Culture Encyclopedia - Photography major - How to zoom the focal length to infinity?
How to zoom the focal length to infinity?
1. Make sure that the camera/lens is in "auto focus" (AF);
2. Auto focus on distant scenery or luminous objects (such as distant mountains, the moon, etc.). );
3. When you hear the sound of autofocus, you know that the lens has been focused to infinity;
4. At this time, immediately set the camera or lens to "Manual Focus" (MF) to avoid touching the focus ring (if any) on the lens, so that the lens is always locked at "Infinite Distance";
Extended data:
The principle of stretching the focal length to infinity;
Anyone who has studied optics knows that distant objects will form an inverted and reduced real image at the focal point on the other side of the convex lens.
Camera shooting will form an area called depth of field before and after the imaging focal plane, which is the acceptable range of imaging clarity.
Usually, when the camera is aimed at an object 20 meters away, the depth of field of the photo may start from 15 meters away from the camera and extend to infinity.
When the lens used by the camera is fixed, the depth of field of the photo is related to the aperture size. The smaller the aperture, the wider the depth of field.
- Previous article:How to shoot a silhouette
- Next article:Abortion in Lantian county hospital is probably much more expensive.
- Related articles
- Where is the detailed address of Fuxin Baodi Hot Spring Town?
- How to repair a black-and-white blurred photo and make it clear?
- Which photo studio in Baoqing County, Shuangyashan is good for taking wedding photos?
- Illustration design with the theme of love ¡ª¡ª How to write the description of illustration design?
- Who plays the role of Queen Xu in Zheng He's Journey to the West?
- Guilin tourism price
- What leisure bag is more atmospheric and simple. Not that kind of colorful! It's better to be a canvas bag! Do you know anything about driftwood? How's it going?
- New Year greetings are short and beautiful.
- What should a child photographer have?
- Dandong children's photography which is good?