Calibrating your meter to match the sensitivity of the CCD chip in your Digital Camera
How do you know if your ccd chip provides the sensitivity that is suggested when setting the ASA on the camera?
You don't!
Not without testing.
The following is a procedure that enables you to exactly match the sensitivity of your chip to the exposure meter you are using.
And, if your not using an external exposure meter for flash or existing light......go back to film...please!
Some say,"I can judge by the histogram on the camera......That is the last place you want to judge exposures outside,, unless you forgot your meter back at the studio.
The extremely short exposure latitude of digital capture makes it of the most importance to use a quality meter when calculating proper exposures and lighting ratios.
If you're meter is off only .3 (three tenths), and on the high side, you will blow highlights on every exposure. No matter how carfully you meter your subject.
Then you will say to the lab...."but my exposures were "dead on"....but your exposure values killed you..
To adjust your hand held meter to your digital camera, follow the following instructions.
This must be done for each camera that you plan to use, and must keep track of the numerical difference between cameras. One might be fast, the other might be slow. You must test each one.
Be sure and fill the frame in the camera with the Black, White and Gray target.
By the way, You can also use the eye dropper tool and set the selection point to 5x5 pixels to measure your gray value.
