How do I use RAW images?
24-Sep-2009
8200615700
Solution
RAW is the name given to an image file type that records image data captured by the camera's image sensor without any processing; it takes the name "RAW" because the data is raw. RAW images have the characteristic that the file sizes are larger than those of JPEG files. When handling the RAW images on a computer, use special applications for RAW images.
When recording JPEG images used with most digital cameras, the image data is processed in the camera to adjust image quality to a suitable level so that it can be used right after being imported to the computer. However, because JPEG data deteriorates whenever it is edited and saved, repeating those functions will cause a loss of image quality.
In contrast, RAW images need to be processed by special software before they can be manipulated with image-editing software. In this case, there is no deterioration of image quality when images are saved, so you can edit and save the images multiple times until you are satisfied with them.
CAUTION
Settings cannot be made for DPOF prints when using RAW images. However, DPOF print settings can be made for JPEG images if the camera is set to record in both RAW and JPEG images simultaneously.
Most image-editing software cannot display RAW images, so some processing is required to open them. "Processing" means converting the RAW images to an appropriate file type such as JPEG so that the file can be manipulated on the computer.
When processing RAW images on a computer, the images will be converted in accordance with the settings (such as Picture Styles) specified in the camera at the time of shooting. Also, the images can be edited using image-editing software in addition to the parameter settings described above.
Once a RAW image has been processed, a new file will be created in addition to the original RAW image. The modification only affects the newly created image so that you can keep the original RAW image. This enables you to repeat the processing until you are satisfied with the image.
To process RAW images, you need to use Digital Photo Professional, ZoomBrowser EX (for Windows), or ImageBrowser (for Macintosh).
The software to be used depends on the computers you are using and your intended use.
For more information on each application, please refer to the supplied documentation.
IMPORTANT
RAW image formats vary depending on the camera manufacturers or models. If you use commercially-available image-editing software, please contact the software company to see if your camera is supported by the software.
RAW images taken with your camera appear on the computer as files with a [.CR2] extension.
This camera's Image-recording Quality Settings for RAW images are as follows:
| Quality | Pixels (megapixels) | Printing Size | File Size (MB) | Possible Shots | Maximum Burst | |
| RAW | 
(RAW) | Approx. 17.9 (17.9M) | A2 or larger | 25.1 | 155 | 15(15) |
(Medium RAW) | Approx. 10.1 (10M) | Around A3 | 17.1 | 229 | 24(24) | |
(Small RAW) | Approx. 4.5 (4.5M) | Around A4 | 11.4 | 345 | 38(38) | |
| RAW+JPEG | +  (RAW + Large/Fine) | Approx. 17.9 Approx. 17.9 | A2 or larger A2 or larger | 25.1+6.6 | 122 | 6(6) |
| + (Medium RAW + Large/Fine) | Approx. 10.1 Approx. 17.9 | Around A3 A2 or larger | 17.1+6.6 | 164 | 6(6) | |
| + (Small RAW + Large/Fine) | Approx. 4.5 Approx. 17.9 | Around A4 A2 or larger | 11.4+6.6 | 217 | 6(6) | |
Figures in parentheses apply to an Ultra DMA (UDMA) 4GB card based on Canon's testing standards.