key con­cept Ex­pos ure value

Dis­cover EV, and how it works

NPhoto - - The Manual On Manual -

Ex­po­sure Value, or EV, is a cen­tral con­cept in ex­po­sure. If you use a hand­held me­ter, like this Gossen Digisix, it dis­plays the ex­po­sure value di­rectly. You can then use the di­als to turn this into any com­bi­na­tion of lens aper­ture and shut­ter speed. Hand­held me­ters might seem quite slow by to­day’s stan­dards, but they do en­cour­age you to see ex­po­sure in a much more straight­for­ward way.

The ex­po­sure value is dis­played on the LCD panel.

You then ro­tate this outer dial to show the same value in this small win­dow.

Now you can read all the pos­si­ble shut­ter speed and aper­ture com­bi­na­tions on these scales

You can also slide this translu­cent dome over the me­ter­ing win­dow to take an in­ci­dent light read­ing to mea­sure the light ac­tu­ally fall­ing on your sub­ject, not just the light it re­flects.

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