Advertisement
16
Part I
Using the Rebel XSi/450D
Choosing the file format
and quality
The file format and quality level that you use
to take your pictures are two of the most
important decisions that you make. These
settings determine not only the number of
images that you can store on the media
card, but also the sizes at which you can
later enlarge and print images from the
Rebel XSi/450D. Table 1.1 explains the
options that you can choose from.
With the high-quality images that the
XSi/450D delivers, you can make beautiful
enlargements from these images. Even if
you don't foresee printing images any larger
Image Quality
L (Large) JPEG (Solid
quarter circle icon)
L (Large) JPEG (Jagged
quarter circle icon)
M (Medium) JPEG (Solid
quarter circle icon)
M (Medium) JPEG (Jagged
quarter circle icon)
S (Small) JPEG (Solid
quarter circle icon)
S (Small) JPEG (Jagged
quarter circle icon)
RAW
RAW + L (Large) (Solid
quarter circle icon)
Rebel XSi/450D File Quality and Size
Approximate File Sizes
in Megabytes (MB)
4.3MB
2.2MB
2.5MB
1.3MB
1.6MB
0.8MB
15.3MB
15.3 + 4.3 = 19.6MB
than 4 × 5 inches, you may get a once-in-a-
lifetime shot and want to print it as large as
possible. For this reason, and to take advan-
tage of the XSi/450D's fine image detail and
high resolution, it pays to shoot at the high-
est quality setting for all your shooting.
The JPEG quality options on the XSi/450D
are shown with two icons that indicate the
compression level of the files and the
recording size. A solid quarter circle icon
indicates a low compression level. A jagged
quarter circle icon indicates a higher com-
pression level. High compression levels
reduce the file size more than low compres-
sion levels so that you can store more
images on the SD/SDHC card. File formats
and compression are discussed next.
Table 1.1
Image Size in Pixels
4272 × 2848
4272 × 2848
3088 × 2056
3088 × 2056
2256 × 1504
2256 × 1504
4272 × 2848
Advertisement
