What kinds of digital camera lenses are there?

Most people don't know what kind of digital camera lens is. Here I bring you the types of digital camera lenses. Welcome to read them, I hope it will help you.

What kinds of digital camera lenses are there? 1 1, standard lens.

The focal length of the standard lens is close to the diagonal of the negative, and its shooting vision is very similar to human vision, and the perspective ratio is roughly the same. Its characteristics are better imaging quality, smaller perspective deformity and large aperture, which is very suitable for remaking or shooting with natural light in low illumination.

2. Wide-angle lens

Generally, a wide-angle lens has a shorter focal length than a standard lens, and has the characteristics of small imaging, wide viewing angle and long depth of field. This kind of lens is especially suitable for shooting large scenes with large depth of field, such as panorama or distant view. The wide-angle lens will be used to shoot meetings, landscapes, news, travel photos and life photos.

3. Long focal length lens

A long focal length lens will have a longer focal length than a standard lens. It has the imaging characteristics of large imaging, small viewing angle and short depth of field, and is suitable for shooting close-ups, close-ups and subjects who need long-distance framing but are not suitable for close-ups. When shooting at close range with a long focal length lens with a large aperture, due to the short depth of field, the requirements for focal length are relatively high, so it needs to be carefully checked to ensure clear focus.

4. Zoom lens

The above three kinds of lenses are fixed focal length lenses, and zoom lens is the most commonly used one for photographers now, because zoom lens is more convenient to view, which can change the focal length of the lens and capture scenes from different perspectives without changing the position of the viewpoint. Zoom lenses include wide-angle to medium-focus zoom lenses, medium-focus to telephoto zoom lenses and telephoto zoom lenses. Users of APS-C single-lens reflex digital cameras can generally choose zoom lenses of 18-55mm( 18-35mm) and 70-2 10mm to shoot various subjects. Compared with the fixed focal length lens, the zoom lens has excellent imaging quality, and a zoom lens with large effective aperture and high zoom ratio has appeared.

5, special effects lens

(1) axis shift lens

(2) Macro lens

What are the functions of zoom lens?

When using a zoom lens to focus, you must first adjust the image to the maximum focus position and use the longest focal length end of the lens to focus. Then reduce the focal length to the desired focal length when shooting. In this process, the image at the focal length is always clear. By using this technology, focusing on the image as large as possible, it is easier to observe whether the image details are clear, which is the most accurate focusing method at present. Some zoom lenses need to rotate two independent control rings, one for focusing and the other for focusing. Don't accidentally change the focal length by adjusting the focal length.

Other zoom lenses can focus by moving a control ring, and sliding back and forth can change the focal length. The operation of this "single ring" zoom lens is also fast and convenient, and the price will be more expensive. When changing the focal length, be sure not to lose the clear focus.

How to clean the lens of digital camera

Most digital cameras cannot be equipped with protective filters, or they are very inconvenient to install. Usually when shooting, the lens is exposed. If you are not careful, it is easy to get a little dust, press a handprint or leave some spit. Although fingerprints, dust and water stains on the lens surface have little effect on imaging.

As long as you don't let the strong sunlight shine directly on the lens and cause fog. But you love cameras, how can you tolerate your beloved camera lens turning into a big face? What if it's not clean? Shit!

Nowadays, lenses are generally multilayer coated. If you are not careful, you will scratch the coating and scratch the lens. Irretrievable damage to the lens. Should I wipe it or not? My experience is that the lens is always getting worse, not better. Don't expect the lens to return to a new look just after it leaves the factory.

Therefore, we suggest not to wipe the lens as a last resort. You have to prepare some tools before cleaning. Conventional weapons include lens water, lens paper (or wet lens paper), lens cloth (or suede), blowing balloons and absorbent cotton. Ok, let's get started.

Blow off the dust with a balloon first, and carefully remove what can't be blown off with lens paper. Be careful not to use force. Take a little absorbent cotton, dip it in lens water to make it wet, and carefully stick off the dust and stains still on the lens. This process should not be forced, otherwise it will easily damage the lens. After ensuring that there are no visible dust particles on the surface, you can wipe it on a large area.

First, prepare a number of smaller cotton balls (or wet lens paper) and press them into cakes, the size of which is one third of the mirror surface. Prepare several large cotton balls and press them into cakes. The size should be two-thirds to three-quarters of the mirror. Try not to expose cotton fibers on the working face.

Dip a small cotton ball into the lens water and do it well. Wipe the mirror spirally from the center, and don't look back. Then, when the lens water is still wet, gently wipe the mirror with a big cotton ball in the same way. If the first time you are not satisfied, you can do it again, but don't use the used cotton ball again. Be careful not to let the lens water directly contact the lens surface, and use lens paper, otherwise the coating of the lens may be damaged or the lens water may penetrate into the lens along the edge of the lens, resulting in fogging or even degumming of the lens.

What if there is no lens water? It doesn't matter, you can use the lens face breathing instead. But be careful: don't pout when breathing. You should open your mouth wide and breathe gently so that you won't throw up.

All we have to do is create a mist on the lens surface. If the lens is plastic, it is best not to wash the lens with lens water or a mixture of alcohol and ether. Be sure to wipe it clean or breathe. However, no matter how carefully you rub it, it will always damage the mirror coating, so don't wipe the lens unless you have to.