How Do You Calculate The Magnification Of A 250MM Lens Camera?
Magnification is usually expressed as a number with the letter X after it, which represents the magnification multiplier of a particular lens. For instance, a 3x magnification lens magnifies images by three times more than what the human eye can see under normal circumstances. This value is typically not reported with camera lenses, as convention is to report camera lenses by focal length. Focal length, measured in millimeters, refers to the distance between the front of a lens’s front glass element and the point at which parallel lines will converge when shone through the camera lens. Write down the maximum focal length of the lens for which you want to find the magnification. For instance, a 70-250 mm lens will have a maximum focal length of 250mm. A prime lens will have only one value listed, and this value should be considered the maximum focal length. Multiply this value by 1.6 if you are attaching the lens to a digital camera. Most digital cameras have a 1.6x “crop factor”, which
