What can Canon's micro lens shoot?

The focal length can't be changed,

It's just the angle of view.

Besides, Canon has a macro of 18.

The macro is longer, which is more suitable for shooting insects. It is too close and scares away.

Baiwei is a very useful head.

Macro and portrait are very good.

some people use it to increase the distance, and shooting birds is also very sharp.

A lens has two fingers in film and television, one refers to the optical components used by movie cameras and projectors to generate images, and the other refers to a continuous picture taken from power-on to power-off, or a fragment between two editing points, which is also called a lens.

One finger and two fingers are two completely different concepts. In order to distinguish them, one refers to the optical lens and the other refers to the lens picture. According to the origin of lenses, they are mainly Japanese lenses and German lenses. Japanese lenses are mainly good in color reduction, while German lenses have a strong sense of hierarchy. China's lens in the market has gradually occupied a certain market, mainly because the price is relatively low.

according to the performance and shape of the lens, there are currently P-type, E-type, L-type and auto-zoom lenses. The information from China Instrument Supermarket is described as follows:

1. P-type lens

(1) The self-positioning lens has adjusted its pupil focus, so it is necessary to check whether the definition from the maximum magnification to the minimum magnification is consistent and clear.

(2) Check the coaxiality, that is, the images from the maximum magnification to the minimum magnification are taken at the same position, and cannot be shifted or shifted too much. All of them are regarded as defective products, and the lens must be replaced again.

(3) the optical magnification is .7—4.5X, that is, there are nine magnifications between .7 and 4.5 times.

(4) The sharpness is judged according to the correction block and the imaging reflection of the actual object.

2. E-type lens

(1) This lens is an ordinary industrial lens, and the pupil focus needs to be manually adjusted. After the machine is installed, when the maximum magnification and the minimum magnification are manually adjusted, the image is equally clear. If the sharpness cannot be adjusted, it is regarded as a defective product, and if unstable factors such as shaking exist in the adjusted lens, it is also regarded as a defective product.

(2) Check the coaxiality, that is, the images from the maximum magnification to the minimum magnification are taken at the same position, and cannot be shifted or shifted too much. All of them are regarded as defective products, and the lens must be replaced again.

(3) The optical magnification is .7-4.5x..

(4) The definition is interpreted according to the correction block and the imaging reflection of the actual object.

3. L-shaped lens

(1) This lens is an ordinary industrial lens, and the pupil focus needs to be adjusted manually. After the machine is installed, the maximum magnification and the minimum magnification are adjusted manually, and the image is equally clear. If the sharpness cannot be adjusted, it will be regarded as a defective product, and if there are unstable factors such as shaking after adjustment, it will also be regarded as a defective product.

(2) Check the coaxiality, that is, the images from the maximum magnification to the minimum magnification are taken at the same position, and cannot be shifted or shifted too much. All of them are regarded as defective products, and the lens must be replaced again.

(3) The optical magnification is .7-4.5x..

(4) The definition is interpreted according to the correction block and the imaging reflection of the actual object.

4. Automatic zoom lens

(1) For automatic positioning, the pupil focus of the lens itself has been adjusted, and it is necessary to check whether the definition from the maximum magnification to the minimum magnification is consistent and clear.

(2) Check the coaxiality, that is, the images from the maximum magnification to the minimum magnification are taken at the same position, and cannot be shifted or shifted too much. All of them are regarded as defective products, and the lens must be replaced again.

(3) The optical magnification is .7-4.5x..

(4) The definition is interpreted according to the correction block and the imaging reflection of the actual object.