RAW format


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#1
Hi everyone...

Was reading about the different file formats... Currently, im using a D30 and shooting in Large Fine, but i from what i read, the compression of jpegs causes stuff to be lost from the image.

The mag was recommending useing .tiff or ever RAW formats....I understand that RW format allows for the most flexibility, but why?

Yep... any lao jiao would care to help?

Cheers
 

dkw

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Dec 10, 2003
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#2
drummercow said:
Hi everyone...

Was reading about the different file formats... Currently, im using a D30 and shooting in Large Fine, but i from what i read, the compression of jpegs causes stuff to be lost from the image.

The mag was recommending useing .tiff or ever RAW formats....I understand that RW format allows for the most flexibility, but why?

Yep... any lao jiao would care to help?

Cheers
Read through this thread,

http://forums.clubsnap.org/showthread.php?t=34559&page=4&pp=20

and this article...

http://194.100.88.243/petteri/pont/pdf/How_to/o_RAW_workflow/_RAW_workflow.pdf

just some starters......
 

hwchoy

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#3
RAW is exactly what it is, the data as it is captured by the sensors, which is the absolute intensity of light impinging upon each sensor elements. However, there is an interpretation of this data, which is expressed or specified by the various settings such as white balance, ISO, etc which is saved in the RAW file as metadata. The camera does not apply any processing to the data other than capturing and storing it.

When you process the RAW file, you have a chance to change the metadata, e.g. you can change the white balance setting, which will affect the interpretation of the data captured by the sensor. As an extreme example, if a sensor read the light intensity as 1222 which might appear as yellow with daylight WB, but will appear as grey with florescent WB.

Yes?
 

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