Canon EOS 1Ds Mark III Instruction Manual page 54

Setting the Image-recording Quality
About RAW
The RAW image is the data output by the image sensor and converted
to digital data which is recorded on the memory card as is. The RAW
image is transferred to a personal computer where software (provided)
is used to adjust the image as needed. From the RAW image, the
software can develop and generate the adjusted image in the desired
type such as JPEG or TIFF.
About sRAW
This is a small RAW image which is one-fourth (approx. 5.2
megapixels) the size of a normal RAW image. As with RAW images,
sRAW images can be developed and adjusted with the provided
software. This image type is handy when you do not need a very high
resolution as a normal RAW image.
Maximum Burst During Continuous Shooting
The maximum burst shown on the preceding page
indicates the number of continuous shots that can be taken
with a formatted 2GB CF card based on Canon's testing
standards.
The actual maximum burst will vary depending on the
subject, memory card brand, image-recording quality
(image size and JPEG quality), ISO speed, drive mode, Picture Style,
Custom Functions, etc. The maximum burst shown are only estimated
figures. In the viewfinder, the approximate maximum burst is indicated
on the right side.
If C.Fn II -2 [High ISO speed noise reduction] is set to [1: On], the
maximum burst will be greatly reduced. (p.163)
If C.Fn I -8 [Safety shift] is set to [2: Enable (ISO speed)], the maximum
burst displayed in the viewfinder will decrease. (p.160)
The maximum burst is displayed even when a memory card is not in the
camera. Make sure that a memory card is loaded before taking a picture.
The maximum burst for <o> is displayed regardless of the drive mode.
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