Zon Mosaic Pro5 User's Guide Page 139

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Observation Tools 139
change if you are using a Barlow lens or a
focal reducer.
To turn on/off a Barlow lens or focal
reducer for given eyepiece or CCD
camera, click the area to the right of the
indicators name in the FOV pane. Any
Barlow lenses or focal reducers that you
added to your equipment list will appear in
a pull-down menu. Select the appropriate
option from the menu.
You should see the size of the onscreen
indicator change when you turn on or off a
Barlow lens or focal reducer.
Adding other indicators: It is possible to
display FOV indicators that do not
correspond to any of the items in your
equipment list. You may wish to do this to
highlight specific objects on your screen
view or printed charts.
To add one of these indicators, click the
Add button in the Other (All Charts) or
Other (This Chart) layer in the FOV
pane. The difference between these two
layers is that indicators added to Other
(This Chart) will automatically disappear
from your list of indicators when you
adjust the sky view in Starry Night. This is
handy if you want to add indicators only to
create a specific image, as you will not
need to go to the trouble of deleting these
indicators after you have created the
image.
Once you press the Add button, a dialog
box opens that allows you to specify the
properties for your new indicator. You can
choose a name, colour, and field of view
for the indicator. Unlike FOV indicators
that are associated with an item from your
Equipment List (which are automatically
centred onscreen), you can also specify the
indicator position.
There are three ways to enter an indicator
position:
Relative to screen centre: Your
indicator will be at a certain offset from
the screen centre. The offset is
determined by the values that you enter
for “Delta H” and “Delta V”. “Delta H”
is the horizontal offset and Delta V is
the vertical offset (both in pixels). An
indicator with an offset of (0,0) would
be directly at the centre of the screen.
RA/Dec: This keeps your indicator
centred on a specific right ascension
and declination on the celestial sphere.
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