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RAW Anonymous
what exactly is raw? people talk about it as if its some magical thing that lets you change all the camera setting after its been taken. this makes no sense to me. like HDR... if something is overexposed in your raw photo, how is it possible to un-overexpose it without actually taking it again. this goes against all i know about photo manipulation...

whats going on?
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Camera-Specific Properties:Equipment MakeCanonCamera ModelCanon PowerShot A520Camera SoftwareAdobe Photoshop CS2 WindowsMaximum Lens Aperturef/2.6Sensing MethodOne-Chip Color AreaImage-Specific Properties:Image OrientationTop, Left-HandHorizontal Resolution180 dpiVertical Resolution180 dpiImage Created2007:02:19 00:12:19Exposure Time1 secF-Numberf/2.6Lens Aperturef/2.6Exposure Bias0 EVMetering ModePatternFlashNo Flash, CompulsoryFocal Length5.81 mmColor Space InformationsRGBImage Width568Image Height426RenderingNormalExposure ModeAutoWhite BalanceAutoScene Capture TypeStandard
>> Anonymous
It's really not that complicated. Go ask the internet. http://www.adobepress.com/articles/article.asp?p=430215&seqNum=2&rl=1
>> Anonymous
RAW captures more color information. That's it.
>> Anonymous
>>40412
12bit vs JPEG's 8bit per channel
>> ac
Raw format is, like the name implies, the raw sensor data from the imaging sensor. I.e., this is before the camera's processor has manipulated it to make it into a JPEG. So:
1. Zero compression artifacts, because there's no lossy compression.
2. The sensor has a wider range. This is how you can adjust the exposure after the fact--you're actually capturing more image data than the JPEG can store, so the processor decides what to clip. With raw, you decide. (It's not a lot more, but it's often enough)
3. White balance is something that's done after the capture, too. With a JPEG, the tonality is locked in. With a raw, you can change the white balance however you want it.

(It's very similar to film vs. paper in the film photography world, if you're familiar with that. The raw is like a negative, the JPEG is like a print.)

The downside, of course, is that the raw files are XBOX HUEG and slow to write and work with. I've never been able to run down the buffer in my Rebel XTi shooting JPEG, but I often hit the limit if I shoot quickly in raw mode.