Metaphor focuses on the central poem.

Focusing is also called focusing, convex lens imaging. For an object at infinity, its imaging position is in the focus.

But there are few opportunities to shoot at infinity (such as shooting mountains and rivers), and most of them are objects within the range of 0 ~ 10 meters. At this time, the imaging position is not at the focus. Before focusing, in order to take such a close-up image, it is necessary to reduce the distance between the lens and the photosensitive element, which can be achieved by moving the position of the lens or the photosensitive element. In practical application, it is most convenient to move the lens assembly, so most lenses have focusing function.

PS, in the old cameras, you can focus by changing the position of the leather cavity, while cameras like Mamiya Six focus by moving the focal plane, and the lens does not move.

It may bring Wan Li closer to home, so we don't think it's four o'clock.

The flowers are faint, and the light is clear with the music.

Proud of color, would rather remember black and white.

The scenery is like a solo dance, but who knows the world.

Inch mirror contains heavenly posture, and dimming has extraordinary wisdom.

It's like being close to each other, and it's more than an elephant.

Thousands of miles shoot famous mountains, and Wan Li shines on Yunquan.

Therefore, Jiang Haike was disappointed to recall his hometown.

The film is sealed and can't be seen. Only ghosts and gods know when it was taken.

It was a coincidence that the tourists recognized the oldest branch of Tianshan Mountain.

Sentences praising photography: The so-called "taking pictures" is just a "moment" when we are "helpless" and capture the two of us alone.

-Nobuyoshi Araki's "Walking in Tokyo" 2. Every photo is a specimen of time.