Pentax Optio X - Manual (Page 24)

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Choose the number of pixels (size) and quality level (data compression
rate) of still pictures according to how you intend to use the pictures you
have taken.
Higher quality levels and numbers of pixels produce clearer images for
printing, but the resulting increase in data volume reduces the total
number of pictures that can be stored in the camera’s built-in memory or
on the SD Memory Card.
The quality of the captured photo or printed picture depends on the
quality level, exposure control, resolution of the printer and a variety of
other factors, so you do not need to select more than the required
number of pixels. 1024×768 is sufficient for printing postcard-size prints.
Refer to the table below for the appropriate settings according to use.
Appropriate Number of Recorded Pixels According to Use
The default setting is 2560×1920.
Appropriate Quality Level According to Use
The default setting is D.
Choose the appropriate number of recorded pixels and quality level for
still pictures on the [A Rec. Mode] menu.
Recorded Pixels and Quality Level
Recorded
Pixels
Use
2560×1920 For printing high quality photos or A4-size pictures, or editing
images on a PC.
For making postcard-size prints.
For posting on a website or attaching to e-mail.
2304Ч1728
2048Ч1536
1600Ч1200
1024Ч 768
640Ч 480
C
Best Lowest compression rate. Suitable for photo prints.
D Better
Standard compression rate. Suitable for viewing the image
on a computer screen.
E
Good
Highest compression rate. Suitable for posting on a website
or attaching to e-mail.
Selecting the Recorded Pixels 1p.79
Selecting the Quality Level 1p.81
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