What's the difference between a fixed-focus lens and a telephoto wide-angle lens?

The difference between a wide-angle lens and a telephoto lens mainly lies in different focal lengths, different viewing ranges and different subjects.

1, different focal lengths

The wide-angle lens is a photographic lens with a focal length below 40mm (17 mm-35 mm);

A telephoto lens is a photographic lens with a focal length greater than 60 mm (60-400 mm).

2. Different framing ranges

At the same position, the range of wide-angle lens is much larger than that of standard lens, and this is the characteristic of wide-angle lens, that is, its field of vision can be wider than that seen by our naked eyes;

The telephoto lens has a telescope-like function, which can help us shoot distant objects. However, its framing range is much smaller than the naked eye (small viewpoint), which is convenient for long-distance snapshot.

3. Different themes

Wide-angle lens has short focal length, wide viewing angle and deep scenery, which is suitable for taking photos of large scenes, such as architecture, scenery and other themes.

A telephoto lens has a long focal length, a small viewing angle and a large image on the negative. Therefore, at the same distance, you can take larger images than the standard lens. Suitable for shooting distant objects.

Because its depth of field is smaller than the standard lens, it can blur the background more effectively and highlight the focused subject, and the subject is generally far away from the camera, which makes the portrait more realistic in perspective, so people often call the telephoto lens a portrait lens.

Influence of wide-angle lens on extended data

1, providing a wider field of vision.

Wide-angle lens can make photos have a wider perspective, and you can shoot more still lives without going backwards. This function is particularly useful in a narrow environment. Of course, shooting wider is also conducive to shooting big scenes.

2. It has the effects of exaggeration, lengthening and amplification.

This can be regarded as one of the common characteristics of wide-angle lenses, because wide-angle lenses are inherently distorted, so things at the edges of photos will be stretched and enlarged, which can be regarded as a benefit or a disadvantage, mainly depending on the effect to be expressed by the subject you are shooting.

3. Reduce the influence of camera vibration on photos (such as hand shock)

Wide-angle photos are not as sensitive to camera movement as long focal lengths. If it is a little vibration, it may have little effect on the photo. In addition, many cameras and lenses also have the function of preventing hand shock, so it is safer to use a slower shutter when shooting!

4. Bring out a sense of space

"Sense of space" means that the scenery in the photo is far and near, big and small, which makes people feel as if they are in it and feel the environment of the place.

5. Reduce the depth of field and make it shallow.

One of the factors of shooting shallow depth of field is to use a long focal length. If the focal length is shorter, that is, the angle is wider, then the depth of field will be relatively shallow and the background will be clearer.

References:

Baidu encyclopedia-wide-angle lens

Baidu encyclopedia-telephoto lens