Zon Mosaic Pro5 User's Guide Page 28

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28 Starry Night User’s Guide
100°. It is important to remember that
when you zoom in on objects, you are not
in fact changing your location. Think of
zooming as looking through a more and
more powerful telescope, while your feet
remain firmly planted.
Your exact field of
view is always listed
in the Zoom control of
the toolbar.
Tip (Pro and Pro Plus only): If you click
on the arrow to the right of the Zoom
display, a pull-down menu opens which
allows you to choose from several preset
fields of view. You can also use the
Magnification tool to adjust your field of
view. See “Magnification Tool
” on
page 31 for more information on the
Magnification tool.
Note: When you zoom in to a very small
field of view, your field of view will be
shown in
arcminutes. If you zoom in even
closer, your field of view will be shown in
arcseconds. One arcminute is 1/60 of a
degree, and one arcsecond is 1/60 of an
arcminute. The smallest field of view
which Starry Night can display is 1
arcsecond.
The compass image in
the upper right corner
(visible only when you
are using the field of
view controls or changing your viewing
direction) provides an excellent graphical
interpretation of the field of view. This
image shows how large a patch of sky is
being displayed in your current view. As
you zoom in, the patch of sky shrinks. As
you zoom out, the patch of sky expands.
The compass image also shows your
viewing direction.
Tip (Enthusiast, Pro and Pro Plus only):
To hide the compass, open the Options
pane, expand the “Guides” layer and
uncheck the “Show compass indicator
while scrolling” box.
Maximum Zoom Out: By default, you are
unable to zoom out past the standard view
of 100°. To zoom out to see an even larger
field of view, choose Preferences from the
File menu (Windows) or the
Starry Night menu (Macintosh), choose
General from the dropbox in the upper
left corner of the Preferences dialog box,
and check the box marked “Allow
Maximum Zoom Out”. Then continue
zooming out using the left zoom button
until you have a circular field of view of
180°, which is the entire hemisphere of
sky that is above the horizon at any one
time. This is the view of the sky that most
planispheres (handheld circular star
charts) represent.
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