Wednesday, May 18, 2016

Hand-Held Light Meters: Principles of Work

When the question is about the hand-held meters, it is important to mention that these are the units that are used to measure up the incidental and reflective light by means of a photo sell that reacts to the light intensity. What the user is required to do is to set the ISO, and he gets a reading in f-stops or the so-called foot candles so that the user could adjust his camera for a perfect and precise exposure.  

How It Works 

 It is important to mention the this device works differently than a sport meter or a TTL meter in your camera, even though both kinds of light meters are used to measure up the reflected light. The H-H LM can be used to measure up the light that is falling on a particular object, as well as the light that is being reflected off this or that object. Mind that the H-H LM can have a significantly narrow field of view that will provide the user with an opportunity to have the most accurate light readings. The user cannot get that narrow a reading on a TTL LM, even when it is set to the Spot. In case with some sorts of H-H LM, holding the button down will guarantee a continuous exposure, so the user has a chance to see the changes of the lightning from place to place, even when the question is about a few inches.  

How to Use It?

Your hand-held light meter is provided with two attachments – a Flat Disc and the a half-sphere. The Flat Disc is usually used in order to read the light that is being reflected. To do so, the user should slip the disc on, as well as hold the metering cell toward the object that he would like to read. The hemisphere is usually used in order to measure the incidental light. The user simply slips the hemisphere on the metering cell, as well as holds the meter directly in front of the particular subject. Thus, the light is falling directly on the sphere just like it is hitting the subject. If the user has such an opportunity, it is highly important to make sure the hemisphere is pointing directly at the lens of the camera. That is how the user will have a better idea of what the image sensor of the camera is about to register, not just a typical light reading.