The A700 has three file size settings: Large,
Medium, and Small. Each of the file formats
can be set to one of the three sizes as
shown in Table 1.1. The sizes are dependant
on the aspect ratio.
ISO Sensitivity
The ISO settings determine how sensitive
the image sensor is to light. The Sony A700
ISO settings range from 100 all the way to
6400, with 100 being the least sensitive
to light and 6400 being the most sensitive to
light. To get a higher sensitivity to light, the
signal from the sensor is amplified, increas-
ing the amount of digital noise that is intro-
duced to the file. Digital noise is unwanted
spots of random color that show up in areas
that should have smooth color. The more
the signal is amplified, the more noise is
introduced. The A700 also has an Auto ISO
mode that sets the ISO value between 200
and 1600.
Viewing Images
on the Camera
At any time, you can press the Playback but-
ton to view on the LCD the most recently
taken image. Once an image is on the
screen, you have many options for viewing
and deciding an image’s fate.
✦
Navigate through the images
using the multi-selector or the
Front or Rear control dials.
✦
Press the Display button to
switch among the three view
modes. Each time you press the
Disp button, the display cycles to
the next display mode. The three
modes are
•
Display with information. In
this mode, the image is overlaid
with the filename, file type, file
size, shutter speed, aperture,
ISO, date and time the image
was recorded, and the image
Chapter 1
✦
Exploring the Sony Alpha A700
33
Table 1.1
Size Chart
3:2 Aspect Ratio
16:9 Aspect Ratio
Large
12M, 4272
×
2848 pixels
10M, 4272
×
2400 pixels
Medium
6.4M, 3104
×
2054 pixels
5.4M, 3104
×
1744 pixels
Small
3.0M, 2128
×
1424 pixels
2.6M, 2128
×
1200 pixels
Exit
Select
ISO
AUTO
ISO sensitivity
AUTO
100
125
160
200
250
1.19
Using the ISO button and the multi-
selector, the ISO can be changed easily.
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