Mov­ing the his­togram

How to shift the po­si­tion of the his­togram and fine-tune the bright­ness of your pic­tures

Digital Camera World - - CAMERA COLLEGE -

When you take pic­tures us­ing your cam­era’s semi-au­to­matic shoot­ing modes, such as Aper­ture Pri­or­ity or Shut­ter Pri­or­ity, chang­ing the cam­era set­tings will have no ef­fect on the over­all bright­ness of an ex­po­sure. The cam­era will sim­ply com­pen­sate for any change you make to the aper­ture, shut­ter speed or ISO so it can main­tain the ex­po­sure it thinks is cor­rect.

To over­ride the cam­era, you’ll need to use ex­po­sure com­pen­sa­tion. Use neg­a­tive ex­po­sure com­pen­sa­tion to shift the his­togram to the left for a darker ex­po­sure, or pos­i­tive ex­po­sure com­pen­sa­tion to shift it to the right for a brighter ex­po­sure.

If you’re us­ing Man­ual mode, chang­ing the aper­ture, shut­ter speed or ISO will have an ef­fect on the ex­po­sure and the po­si­tion of the his­togram. For in­stance, if you in­crease the ex­po­sure by set­ting a slower shut­ter speed, a larger aper­ture or a higher ISO , you should see the his­togram move to the right. The set­ting or com­bi­na­tion of set­tings you change to in­crease or de­crease the ex­po­sure will be de­ter­mined by the ef­fect you’re look­ing for in your pic­ture. You can see what hap­pens when you shift the set­tings in Man­ual mode in our di­a­gram here…

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