What dose lens nomber mean and wich one is better? for example 18-55mm or 70-200mm?

Answer 1

The numbers tell you whether the camera is made primarily for close subjects (for example portraits) of for far subjects (for example landscapes or wildlife).

So which is "best" depends on what you want to do with the camera.

18-55mm is primarily a "wide-angle" lens. It captures a wider than normal view and would be good for photographing a large group of people. Or anything large and relatively close to you. You can also get a wide view of a big subject, say the Grand Canyon, but all the detail would look very small and far away.

70-200 mm is primarily a "telephoto" lens. It is good for photographing something relatively far away from you. It will make the subject look closer, like a telescope would. So it is good for pictures of things in nature, when you cannot get up close, but you want a picture that looks close.

Most cameras have a lens in the middle, like 35-105mm. The works well in the range that most people expect a camera to function.

Some cameras now have a longer range from 35-420mm. When using the longest telephoto setting, it is best to have a tripod or image stabilization to overcome camera shake.

Answer 2

The number on the lens is a measurement of length. It is the distance from the film surface to the lens. The effect is either a wide angle or telephoto composition of the subject.

The ranges you enumerate (18-55mm) means it could be a zoom lens that changes the length, zooming in and zooming out.

You should test out the lenses in the store before you buy. Which one is best depends on the kind of photography you do. You want the longer one, (70-200Mmm) if you do a lot of distance photos that you want the subject to appear closer. The trade off with the longer lenses is that it is harder to keep the camera still enough to eliminate motion blur. If you cannot develop the ability to keep the camera still, you should use a tripod to make your pictures clear.

You may want the shorter lens (18-55mm) if you are going to take photos in close proximity and you want as much of the subject in the field of view as possible.

The best bet is to look through the lenses, adjust the zoom and see if it fits the needs of the photos you take most.

Answer 3

The lens number usually refers to the DIAMETER of the OBJECTIVE LENS... What does this mean to you?

Well.. simply put, the object lenses are the lenses which you don't put your eyes on (if you are looking through a binoculars for eg; or in the case of a camera it's the side which you "point and shoot with".)

Since the objective lenses are the lenses which collect all the light from outside and focus it into your camera or into your eyes, then the larger a lens is the better it is. Larger lenses mean more light gets in to give bright crisp pictures. Larger lenses are well suited for zooming devices or close ups as zooming can tend to weaken the light concentration.

Answer 4

Its the Focal length...of the Cam Lens..

Useful to find out the distance to which you can focus properly...Cam viewing range..

Generally Viewable Range = 1/ (focal length) meters