Go to the camera with your eyes and look at it, what is the type of camera that you shoot again?

The difference between the eyes and a camera is that the human eye adjusts the focal length to obtain a clear image, while a normal camera changes the distance to make the image clear. The farthest point that can be seen clearly due to the adjustment of the eye is called the far point.

The far point of a normal person is at a great distance. The closest point that the eye can see clearly is called the near point. The proximal point of a normal person is about 10cm; The distance that is not easy to feel fatigued is called photopic distance, and the photopic distance of the normal human eye is 25cm; The angle between two straight lines caused by the optical center of the eye to the ends of the object is called the angle of view, and the larger the angle of view, the clearer the observation of the object.

Hello, the structure of the eye is very similar to that of a camera. Directly in front of the eyeball is the lens, which acts as the lens of a camera. In front of the lens is the iris, and in the middle there is a small round hole called the pupil, which can be enlarged or reduced to control the amount of light entering the eye, which is equivalent to the aperture of the camera.

At the base of the eye is the retina, which is equivalent to the negative of the camera, except that the camera negative uses chemical methods to preserve the image, and the retina transmits the influence to the brain through the optic nerve.

1.Lens.

2.Retina.

3.Retina.

4.Handstand. 5.Zoom out 6True.

The most fundamental difference is the way of framing and focusing.

When using an optical viewfinder, the image is generated by direct observation of the light coming in from the lens with the naked eye, and the focus is performed using the phase contrast focusing method.

When framing with an LCD screen, the optical viewfinder is black, and the light enters from the lens and is directly illuminated on the CMOS, and then the contrast of the image is analyzed by the processor for contrast focusing.

Since the design purpose of the SLR camera is mainly to frame through the optical viewfinder, the contrast focusing performance of the SLR is very average, and the speed is slow, which is not conducive to capturing, and the optical viewfinder must be used when using the faster phase difference focusing, so it is difficult to frame the shooting at special angles such as high or low position.

But this phenomenon is not suitable for single-camera cameras. Sony's transflective SLR (Sony calls it a single battery) is viewed by LCD or EVF, but uses phase difference focusing; The Panasonic Olympus single electric (the same Sony is called a mirrorless one) uses pure contrast focusing, but the speed and accuracy are higher than the phase difference focusing of ordinary SLR.

The so-called eyes and cameras actually have this thing in common, the aperture and the shutter. The eye also has a shutter speed.

You can't see things clearly at a glance, just like the shutter speed of a camera, the eye reflects the image in the pupil, and the camera reacts everything to the CCD.

In addition, you may feel that you are in a very bright place and suddenly you are in a very dark place, and you can't see anything, but after a while, your eyes will be able to see things when they get used to the light. This is the pupil is dilated, just like the aperture of the camera jumps wider, and the dark spots can be seen clearly, in short, the imaging principle of the camera does imitate the eye, just like our previous double reflex lens, his imaging principle is closer to the eye.

The lens of the eyeball acts as a lens, equivalent to the lens of a camera (not equal).

Each eye is equivalent to a 45-55mm lens, both eyes are equivalent to a 35mm angle of view, the aperture is f2 f8, and hundreds of millions of pixels are oversampled (combined to improve pixel accuracy and low-light quality) into a dynamic of 4 million pixels per second at 24 frames per second**, and the usable ISO is about 16000