Canon MARK IV User Manual (en)

Setting the Image-recording Quality
A RAW image is the raw data output by the image sensor, converted to 
digital data and recorded on the card as is. You can select from 1, 
, or 61 (Commonly referred as RAW in this manual).
With RAW images, you can use the provided software to make various 
adjustments as desired and then generate a JPEG, TIFF, etc., image.
The maximum burst during continuous shooting indicated 
on the preceding page is the number of continuous shots 
that can be taken without stopping, based on a formatted 
In the viewfinder, the approximate maximum burst is 
indicated on the right side.
About RAW
Maximum Burst During Continuous Shooting
Commercially-available software might not be able to display RAW images. 
Using the provided software is recommended.
The maximum burst is displayed even when a card is not inserted in the 
camera. Make sure that a card is loaded before taking a picture.
If [8C.Fn II -2: High ISO speed noise reduction] is set to [2: Strong], 
the maximum burst will be greatly reduced (p.214).
If the viewfinder displays “99” for the maximum burst, it means the 
maximum burst is 99 or higher. If the maximum burst decreases to 98 or 
lower and the internal buffer memory becomes full, “buSY” will be 
displayed on the top LCD panel and in the viewfinder and shooting will 
be disabled temporarily. If you stop the continuous shooting, the 
maximum burst will increase. After all the captured images are written to 
the card, the maximum burst will be as listed on page 61.
The maximum burst indicator in the viewfinder will not change even 
when you use a UDMA CF card. However, the maximum burst shown in 
parentheses on page 61 will apply.