Friday, July 30, 2010

Understand Camera Lens Numbers

If you're aching to get that perfect shot, one of the things you'll need to do is have an understanding of your camera and what the numbers on the lens of the camera mean. These make all the difference in your picture quality and angle, so know what you're getting into before you make a camera purchase and start shooting.


Instructions


1. Look at the mm number. This number is the millimeter number and tells you the distance between the focal point and the sensor of the camera. Smaller mm numbers result in more widely angled pictures. Sometimes camera lenses have a mm range, which means that the focal point of the lens can be changed (i.e., you can zoom in).


2. Note the ratio number (often having an f in front of it), which tells you what size you can make the aperture. The aperture basically tells you how much light is able to get to the camera sensor. Low aperture numbers mean better pictures in low light.


3. Look for the null symbol followed by a number. This tells you the size of screw-on filter that can be attached to the lens.


4. Check for Roman numerals, which tell you what part of a series (generation) the lens is. A III, for instance, would mean that it's the third lens of a particular type from a manufacturer.

Tags: focal point, number This