Chapter 1
Setting Up the EOS Rebel T2i/550D
19
Because RAW is a lossless format (no loss of image data), image quality is not
degraded by compression. However, RAW fi les are larger, so you can store fewer
RAW images on the media card than JPEG images.
RAW fi les are denoted with a .CR2 fi le name extension. After converting the RAW
data, you can save the image in a standard fi le format such as TIFF or JPEG.
RAW + JPEG
On the Rebel T2i/550D, you can also choose to capture both RAW and Large/Fine JPEG
images simultaneously. The RAW+JPEG option on the image Quality screen is handy
when you want the advantages that RAW fi les offer, and you also want a JPEG image
to quickly post on a Web site or to send in e-mail. If you choose RAW+JPEG, both
images are saved in the same folder with the same fi le number but with different fi le
extensions. RAW fi les have a .CR2 extension, and JPEG fi les have a .JPG extension.
To set the image quality, follow these steps:
1.
Press the Menu button, and then turn the Main dial to select the Shooting
1 menu.
2.
Press the down or up cross key to select Quality.
3.
Press the Set button.
The Quality screen appears with the currently selected
quality setting displayed along with the image dimensions in pixels and the approx-
imate number of images you can store on the current media card in the camera.
4.
Press the right or left cross key to select the size and quality that you want.
5.
Press the Set button.
Changing File Numbering
When you begin shooting images, the
Rebel T2i/550D automatically creates a
folder on the SD/SDHC card to store the
images. The folder is named 100Canon,
and you see the folder when you down-
load images from the camera to the
computer. In addition, the camera num-
bers the images and assigns prefi xes
and fi le extensions. Both JPEG and RAW
fi les begin with the prefi x IMG_. Movie
fi les begin with MVI_ and have a .MOV
fi le extension.
File numbering
Continuous
Auto reset
Manual reset
DISP.
1.7
The File numbering options screen
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