Kneel for the lens classification of SLR camera and the positioning of various lenses when shooting.

The approximate purpose of each focusing lens

Many uses, any focal length is ok, the following are just general habits.

8mm: extremely exaggerated picture, unlimited use.

18- 16mm: same as above.

22mm-24mm: imprecise architectural panorama, or natural landscape (preciseness requires large frame and shifting lens to correct differences), urban buildings and a large number of people.

28mm: Wide scenery, crowded scenes and portraits with a sense of community.

35mm: general landscape, building or building interior, documentary portrait.

50mm: local scenery, full-length portrait, in fact, any scene and theme can be used.

60-65mm: small macro, suitable for shooting some cup-sized objects or rice cookers and other commodities. This focal length is suitable for buying macro lenses.

80 mm: bust, some close-ups, or highlighting someone in the scene.

100mm: Macro gold focal length, especially suitable for shooting macro subjects.

135mm: portrait focal length, suitable for portrait close-up. Those MMs on the Internet that are particularly beautiful with blurred background are all shot at this focal length (generally, an 85mm lens is placed on an ordinary APS SLR, and due to the conversion factor, the focal length of 135 can just be obtained).

200mm: portrait close-up, big head, long-distance shooting.

300mm: People in the distance want to take close-ups, birds in the distance, sports, and distant shots.

400 mm-600 mm: wild animals, football matches, etc.

1200mm: astrophotography, dangerous wildlife, large-scale stadium competition.

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The focal length of 50 mm is the best and worst, which is close to the effect seen by human eyes, so there is no wide-angle shock and telephoto shock, but the top works shot by 50 mm lens in history are more than the sum of all other focal lengths.

50mm can't have the impact of the picture itself, so 50mm must win by content. Composition, color, connotation and story are extremely important, so it can usually make great works.

35mm is the favorite of news photography. It is quasi-wide-angle, which can accommodate more things than the human eye can see, and will not contain many unimportant things like the ultra-wide angle below 28 focal length.

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The above is the focal length of the whole picture. If the machine is aps, Micro4/3 and other systems, pay attention to the conversion factor.