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05/21/2005 02:27:41 AM · #1 |
| i'm having exposure issues. can someone tell me how to properly expose you images? |
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05/21/2005 03:12:19 AM · #2 |
You need to understand the basics of how a camera's light meter works. Your camera is measuring the light that is reflected onto the sensor by the subject. The camera has no idea whether it is seeing a black wall under extremely bright light or a white wall under extremely dim light, for example: each might reflect the same actual amount of light.
So the camera assumes that the average value of everything it is metering is a middle-gray tonality, 18% gray to be precise. You can see what this looks like by going to vote on an image in one of the challenges: there's a gray-tone strip under every image, and Zone 5 gray, middle gray, is the central square in that strip.
If you were to go find a black wall under direct sunlight and shoot it at the indicated exposure, then find a white wall in the same light and shoot THAT at the indicated exposure, the two images would indistinguishable from each other; they'd both be middle gray. IN order to compensate for this, you need to use some mental effort; if your scene is brighter than average, use your exposure compensation feature to increase the EV (exposure value) appropriately. And if your scene is darker than average, decrease the exposure value.
A related discussion is here: //www.dpchallenge.com/forum.php?action=read&FORUM_THREAD_ID=213525
Feel free to post in this thread any more specific questions you have; this is a very broad topic.
Robt.
Message edited by author 2005-05-21 07:03:42.
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05/21/2005 06:52:46 AM · #3 |
Here is an exposure issue suggestion for you: don't show your "johnson" in public becaue you'll end up in jail... at least that's what Jacko told me. LOL!
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