That number is the focal length of the camera's lens ... which focuses light from the scene to form an image on the 'film' or CCD inside the camera. The longer the focal length of the lens, the larger (nearer) the objects appear to be in the picture. (One radian of angle as seen by the lens ===> One focal length on the film.) On the cameras described in the question, the focal length is given as a range ... "from 18 to 200 mm", and "from 55 to 200 mm". Each of these is a "zoom" lens, whose focal length can be changed over the range, enabling the user to cause objects in the picture to appear somewhat nearer or farther away.
mm means millimeter which is small unit of measuring length
the lens zooms from 18 toi 55 milimetres.
18 mm is the wide angle focal length and 200 mm is the telephoto limit of the zoom. for more info searching on focal length and field of view will give you lots of info.
18 is 0.9% of 200
18
18 is what percent of 200= 18 / 200= 0.09Converting decimal to a percentage:0.09 * 100 = 9%
18 out of 200 as a percentage is 18/200 = 9/100 = 9%
i would advise a 18 55 lens and a 18 70 lens. They are good beginner lenses in low light but i would advise an 18 135, 18 200, 70 300
200 + 18% = 236
189/100 of 200 is 18.
200*18/100 = 36
200 x 18 = 3,600 meters