Manual Focus Lens: Working Principle And 4 Advantages

Manual focus refers to the focusing method that can achieve clear focus by rotating the lens focusing ring or by pressing the direction key of the body to step. In the digital camera era, manual focusing is generally used when auto-focusing is wrong. It is a powerful supplement to auto-focusing and is still an indispensable function in the digital era.

Here is the content list:

●Advantages of the manual focusing lens

●Working principle of the manual focusing

Working principle of the manual focus lens

Adjust the final focus manually. It can be divided into two types: electronic manual focus lens and full-time mechanical manual focusing . The electronic manual focus lens is matched with a large-aperture ultra-telescope lens. The electronic circuit detects the rotation of the manual focus lens ring and then drives the mirror motor. When the full-time mechanical manual focus lens is started, it does not need to consume power. It drives the lens group by the roller and rotating ring which is different from those in AF.

Manual focus lens is a kind of focusing method that adjusts the camera lens by manually rotating the focusing ring to make the captured pictures clear. This method largely depends on the human eye's judgment of the image on the focusing screen, the photographer's proficiency, and even the photographer's vision.

Advantages of the manual focus lens

1. Small size.

There is no motor or transmission rod in the barrel of the manual focus lens, so it can be made smaller.

2. Very durable.

The auto focus lens and focusing motor are aging or broken, which is only a matter of frequency and time. Under normal storage, the manual head will not break. The aging and even falling off of the coating are mainly caused by temperature difference oxidation. However, under normal use and storage conditions, it is no problem that the service life of the coating technology is shorter than 30 years. In short, the manual head has few parts and no electronic parts. It is very durable.

3. Most of the manual focus lens are small and very pressing because they are made of a metal cylinder, which is much stronger than the plastic cylinder of the automatic focusing head. The auto focus lens is large, and much of its volume is occupied by the focusing motor and transmission rod. Most of the moving heads are metal cylinders, while most of the automatic heads are plastic cylinders. They are made of metal copper. They are strong, and resistant to building and falling, which is a big advantage.

4. Most manual focus lens have excellent optical imaging quality. This is not because imaging is excellent without a focusing motor. After there is no motor, there is a lot of space available. You can increase the diameter of the lens and make room to make the design of the lens group free. Very durable. The autofocus lens and focusing motor are aging or broken, which is only a matter of frequency and time. Under normal storage, the manual head will not break. The aging and even falling off of the coating are mainly caused by temperature difference oxidation.

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